Oracle SQL Expert Certification - Part II

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Pregunta 1 de 71

Evaluate the following ALTER TABLE statement:
ALTER TABLE orders
SET UNUSED order_date;
Which statement is true?

Selecciona una de las siguientes respuestas posibles:

The DESCRIBE command would still display the ORDER_DATE column.
ROLLBACK can be used to get back the ORDER_DATE column in the ORDERS table.
The ORDER_DATE column should be empty for the ALTER TABLE command to execute successfully.
After executing the ALTER TABLE command, you can add a new column called ORDER_DATE to the
ORDERS table.

Explicación

Pregunta 2 de 71

View the Exhibit and examine the ORDERS table. The ORDERS table contains data and all orders have been
assigned a customer ID. Which statement would add a NOT NULL constraint to the CUSTOMER_ID column?

Selecciona una de las siguientes respuestas posibles:

ALTER TABLE orders
ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
ALTER TABLE orders
MODIFY customer_id CONSTRAINT orders_cust_id_nn NOT NULL;
ALTER TABLE orders
MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
ALTER TABLE orders
ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;

Explicación

Pregunta 3 de 71

Which three statements indicate the end of a transaction? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

after a COMMIT is issued
after a ROLLBACK is issued
after a SAVEPOINT is issued
after a SELECT statement is issued
after a CREATE statement is issued

Explicación

Pregunta 4 de 71

View the Exhibit and examine the structure of the ORDERS table. You have to display ORDER_ID,
ORDER_DATE, and CUSTOMER_ID for all those orders that were placed after the last order placed by the
customer whose CUSTOMER_ID is 101. Which query would give you the desired output?

Selecciona una de las siguientes respuestas posibles:

SELECT order_id, order_date FROM orders
WHERE order_date > ALL (SELECT MAX(order_date)
FROM orders ) AND
customer_id = 101;
SELECT order_id, order_date FROM orders
WHERE order_date > ANY (SELECT order_date
FROM orders
WHERE customer_id = 101);
SELECT order_id, order_date FROM orders
WHERE order_date > ALL (SELECT order_date
FROM orders
WHERE customer_id = 101);
SELECT order_id, order_date FROM orders
WHERE order_date IN (SELECT order_date
FROM orders
WHERE customer_id = 101);

Explicación

Pregunta 5 de 71

You need to create a table with the following column specifications:
1. Employee ID (numeric data type) for each employee
2. Employee Name, (character data type) which stores the employee name
3. Hire date, to store the date when the employee joined the organization
4. Status (character data type). It should contain the value "ACTIVE" if no data is entered.
5. Resume (character large object [CLOB] data type), which would contain the resume submitted by the
employee
Which is the correct syntax to create this table?

Selecciona una de las siguientes respuestas posibles:

CREATE TABLE EMP_1
(emp_id NUMBER(4),
emp_name VARCHAR2(25),
start_date DATE,
e_status VARCHAR2(10) DEFAULT 'ACTIVE',
resume CLOB(200));
CREATE TABLE 1_EMP
(emp_id NUMBER(4),
emp_name VARCHAR2(25),
start_date DATE,
emp_status VARCHAR2(10) DEFAULT 'ACTIVE',
resume CLOB);
CREATE TABLE 1_EMP
(emp_id NUMBER(4),
emp_name VARCHAR2(25),
start_date DATE,
emp_status VARCHAR2(10) DEFAULT "ACTIVE",
resume CLOB);
CREATE TABLE EMP_1
(emp_id NUMBER,
emp_name VARCHAR2(25),
start_date DATE,
emp_status VARCHAR2(10) DEFAULT 'ACTIVE',
resume CLOB);

Explicación

Pregunta 6 de 71

The details of the order ID, order date, order total, and customer ID are obtained from the ORDERS table. If
the order value is more than 30000, the details have to be added to the LARGE_ORDERS table. The order
ID, order date, and order total should be added to the ORDER_HISTORY table, and order ID and customer ID
should be added to the CUST_HISTORY table. Which multitable INSERT statement would you use?

Selecciona una de las siguientes respuestas posibles:

Pivoting INSERT
Unconditional INSERT
Conditional ALL INSERT
Conditional FIRST INSERT

Explicación

Pregunta 7 de 71

View the Exhibit and examine the description of the EMPLOYEES table. Evaluate the following SQL
statement:
SELECT first_name, employee_id, NEXT_DAY(ADD_MONTHS(hire_date, 6), 1) "Review" FROM employees;
The query was written to retrieve the FIRST_NAME, EMPLOYEE_ID, and review date for employees. The
review date is the first Monday after the completion of six months of the hiring. The NLS_TERRITORY
parameter is set to AMERICA in the session.
Which statement is true regarding this query?

Selecciona una de las siguientes respuestas posibles:

The query would execute to give the desired output.
The query would not execute because date functions cannot be nested.
The query would execute but the output would give review dates that are Sundays.
The query would not execute because the NEXT_DAY function accepts a string as argument.

Explicación

Pregunta 8 de 71

View the Exhibit and examine the structure of the EMPLOYEES table. You want to display all employees and
their managers having 100 as the MANAGER_ID. You want the output in two columns: the first column would
have the LAST_NAME of the managers and the second column would have LAST_NAME of the employees.
Which SQL statement would you execute?

Selecciona una de las siguientes respuestas posibles:

SELECT m.last_name "Manager", e.last_name "Employee" FROM employees m JOIN employees e
ON m.employee_id = e.manager_id
WHERE m.manager_id=100;
SELECT m.last_name "Manager", e.last_name "Employee" FROM employees m JOIN employees e
ON m.employee_id = e.manager_id
WHERE e.manager_id=100;
SELECT m.last_name "Manager", e.last_name "Employee" FROM employees m JOIN employees e
ON e.employee_id = m.manager_id
WHERE m.manager_id=100;
SELECT m.last_name "Manager", e.last_name "Employee" FROM employees m JOIN employees e
WHERE m.employee_id = e.manager_id AND e.manager_id=100;

Explicación

Pregunta 9 de 71

View the Exhibit1 and examine the descriptions of the EMPLOYEES and DEPARTMENTS tables.
SELECT e.department_id, e.job_id, d.location_id, sum(e.salary) total GROUPING(e.department_id)
GRP_DEPT,
GROUPING(e.job_id) GRP_JOB,
GROUPING(d.location_id) GRP_LOC
FROM employees e JOIN departments d
ON e.department_id = d.department_id
GROUP BY ROLLUP (e.department_id, e.job_id, d.location_id);
View the Exhibit2 and examine the output of the command.
Which two statements are true regarding the output? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

The value 1 in GRP_LOC means that the LOCATION_ID column is taken into account to generate the
subtotal.
The value 1 in GRP_JOB and GRP_LOC means that JOB_ID and LOCATION_ID columns are not taken
into account to generate the subtotal.
The value 1 in GRP_JOB and GRP_LOC means that the NULL value in JOB_ID and LOCATION_ID
columns are taken into account to generate the subtotal.
The value 0 in GRP_DEPT, GRP_JOB, and GRP_LOC means that DEPARTMENT_ID, JOB_ID, and
LOCATION_ID columns are taken into account to generate the subtotal.

Explicación

Pregunta 10 de 71

View the Exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables. To retrieve
data for all the employees for their EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, the following
SQL statement was written:
SELECT employee_id, first_name, department_name
FROM employees
NATURAL JOIN departments;
The desired output is not obtained after executing the above SQL statement. What could be the reason for
this?

Selecciona una de las siguientes respuestas posibles:

The NATURAL JOIN clause is missing the USING clause.
The table prefix is missing for the column names in the SELECT clause.
The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name
and data type.

Explicación

Pregunta 11 de 71

View the Exhibit and examine the descriptions of the DEPT and LOCATIONS tables. You want to update the
CITY column of the DEPT table for all the rows with the corresponding value in the CITY column of the
LOCATIONS table for each department. Which SQL statement would you execute to accomplish the task?

Selecciona una de las siguientes respuestas posibles:

UPDATE dept d
SET city = ANY (SELECT city
FROM locations l);
UPDATE dept d
SET city = (SELECT city
FROM locations l)
WHERE d.location_id = l.location_id;
UPDATE dept d
SET city = (SELECT city
FROM locations l
WHERE d.location_id = l.location_id);
UPDATE dept d
SET city = ALL (SELECT city
FROM locations l
WHERE d.location_id = l.location_id);

Explicación

Pregunta 12 de 71

View the Exhibit and examine the data in the LOCATIONS table. Evaluate the following SQL statement:
SELECT street_address
FROM locations
WHERE
REGEXP_INSTR(street_address,'[^[:alpha:]]') = 1;
Which statement is true regarding the output of this SQL statement?

Selecciona una de las siguientes respuestas posibles:

It would display all the street addresses that do not have a substring 'alpha'.
It would display all the street addresses where the first character is a special character.
It would display all the street addresses where the first character is a letter of the alphabet.
It would display all the street addresses where the first character is not a letter of the alphabet.

Explicación

Pregunta 13 de 71

Evaluate the following expression using meta character for regular expression:
'[^Ale|ax.r$]'
Which two matches would be returned by this expression? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Alex
Alax
Alxer
Alaxendar
Alexender

Explicación

Pregunta 14 de 71

The ORDERS table belongs to the user OE. OE has granted the SELECT privilege on the ORDERS table to
the user HR. Which statement would create a synonym ORD so that HR can execute the following query
successfully?
SELECT * FROM ord;

Selecciona una de las siguientes respuestas posibles:

CREATE SYNONYM ord FOR orders; This command is issued by OE.
CREATE PUBLIC SYNONYM ord FOR orders; This command is issued by OE.
CREATE SYNONYM ord FOR oe.orders; This command is issued by the database administrator.
CREATE PUBLIC SYNONYM ord FOR oe.orders; This command is issued by the database administrator.

Explicación

Pregunta 15 de 71

View the Exhibit and examine the description of the EMPLOYEES and DEPARTMENTS tables. You want to
display the LAST_NAME for the employees, LAST_NAME for the manager of the employees, and the
DEPARTMENT_NAME for the employees having 100 as MANAGER_ID.
The following SQL statement was written:
SELECT m.last_name "Manager", e.last_name "Employee", department_name "Department" FROM
employees m JOIN employees e
ON (m.employee_id = e.manager_id)
WHERE e.manager_id=100
JOIN departments d
ON (e.department_id = d.department_id);
Which statement is true regarding the output of this SQL statement?

Selecciona una de las siguientes respuestas posibles:

The statement would provide the desired results.
The statement would not execute because the ON clause is written twice
The statement would not execute because the WHERE clause is wrongly placed.
The statement would not execute because the self join uses the ON clause instead of the USING clause.

Explicación

Pregunta 16 de 71

Evaluate the following DELETE statement:
DELETE FROM orders;
There are no other uncommitted transactions on the ORDERS table.
Which statement is true about the DELETE statement?

Selecciona una de las siguientes respuestas posibles:

It removes all the rows in the table and allows ROLLBACK.
It would not remove the rows if the table has a primary key.
It removes all the rows as well as the structure of the table.
It removes all the rows in the table and does not allow ROLLBACK.

Explicación

Pregunta 17 de 71

View the Exhibit and examine the structure of ORDERS and ORDER_ITEMS tables.
ORDER_ID is the primary key in the ORDERS table. It is also the foreign key in the ORDER_ITEMS table
wherein it is created with the ON DELETE CASCADE option. Which DELETE statement would execute
successfully?

Selecciona una de las siguientes respuestas posibles:

DELETE order_id
FROM orders
WHERE order_total < 1000;
DELETE orders
WHERE order_total < 1000;
DELETE
FROM orders
WHERE (SELECT order_id
FROM order_items);
DELETE orders o, order_items i
WHERE o.order_id = i.order_id;

Explicación

Pregunta 18 de 71

View the Exhibit and examine the description for EMPLOYEES and DEPARTMENTS tables.
Evaluate the following SQL statement:
SELECT e.department_id, e.job_id, d.location_id, sum(e.salary) total FROM employees e JOIN departments
d
ON e.department_id = d.department_id
GROUP BY CUBE (e.department_id, e.job_id, d.location_id);
Which two statements are true regarding the output of this command? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

The output would display the total salary for all the departments.
The output would display the total salary for all the JOB_IDs in a department.
The output would display only the grand total of the salary for all JOB_IDs in a LOCATION_ID.
The output would display the grand total of the salary for only the groups specified in the GROUP BY
clause.

Explicación

Pregunta 19 de 71

View the Exhibit and examine the data in EMP and DEPT tables. In the DEPT table, DEPTNO is the
PRIMARY KEY. In the EMP table, EMPNO is the PRIMARY KEY and DEPTNO is the FOREIGN KEY
referencing the DEPTNO column in the DEPT table. What would be the outcome of the following statements
executed in the given sequence?
DROP TABLE emp;
FLASHBACK TABLE emp TO BEFORE DROP;
INSERT INTO emp VALUES (2,COTT 10);
INSERT INTO emp VALUES (3,ING 55);

Selecciona una o más de las siguientes respuestas posibles:

Both the INSERT statements would fail because all constraints are automatically retrieved when the table
is flashed back.
Both the INSERT statements would succeed because none of the constraints on the table are
automatically retrieved when the table is flashed back.
Only the first INSERT statement would succeed because all the constraints except the primary key
constraint are automatically retrieved after a table is flashed back.
Only the second INSERT statement would succeed because all the constraints except referential integrity
constraints that reference other tables are retrieved automatically after the table is flashed back.

Explicación

Pregunta 20 de 71

View the Exhibit and examine the structure of the ORDERS table. The ORDER_ID column is the PRIMARY
KEY in the ORDERS table. Evaluate the following CREATE TABLE command:
CREATE TABLE new_orders(ord_id, ord_date DEFAULT SYSDATE, cust_id) AS
SELECT order_id,order_date,customer_id
FROM orders;
Which statement is true regarding the above command?

Selecciona una de las siguientes respuestas posibles:

The NEW_ORDERS table would not get created because the DEFAULT value cannot be specified in the
column definition.
The NEW_ORDERS table would get created and only the NOT NULL constraint defined on the specified
columns would be passed to the new table.
The NEW_ORDERS table would not get created because the column names in the CREATE TABLE
command and the SELECT clause do not match.
The NEW_ORDERS table would get created and all the constraints defined on the specified columns in
the ORDERS table would be passed to the new table.

Explicación

Pregunta 21 de 71

Which two statements are true regarding the GROUP BY clause in a SQL statement? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

You can use column alias in the GROUP BY clause.
Using the WHERE clause after the GROUP BY clause excludes the rows after creating groups.
The GROUP BY clause is mandatory if you are using an aggregate function in the SELECT clause.
Using the WHERE clause before the GROUP BY clause excludes the rows before creating groups.
If the SELECT clause has an aggregate function, then those individual columns without an aggregate
function in the SELECT clause should be included in the GROUP BY clause.

Explicación

Pregunta 22 de 71

Which statement is true regarding synonyms?

Selecciona una de las siguientes respuestas posibles:

Synonyms can be created for tables but not views.
Synonyms are used to reference only those tables that are owned by another user.
A public synonym and a private synonym can exist with the same name for the same table.
The DROP SYNONYM statement removes the synonym, and the status of the table on which the synonym
has been created becomes invalid.

Explicación

Pregunta 23 de 71

Evaluate the following command: CREATE TABLE employees
CREATE TABLE employees
(employee_id NUMBER(2) PRIMARY KEY,
last_name VARCHAR2(25) NOT NULL,
department_id NUMBER(2),
job_id VARCHAR2(8),
salary NUMBER(10,2));
You issue the following command to create a view that displays the IDs and last names of the sales staff in
the organization:
CREATE OR REPLACE VIEW sales_staff_vu AS
SELECT employee_id, last_name,job_id
FROM employees
WHERE job_id LIKE 'SA_%' WITH CHECK OPTION;
Which statements are true regarding the above view? (Choose all that apply.)

Selecciona una o más de las siguientes respuestas posibles:

It allows you to insert details of all new staff into the EMPLOYEES table.
It allows you to delete the details of the existing sales staff from the EMPLOYEES table.
It allows you to update the job ids of the existing sales staff to any other job id in the EMPLOYEES table.
It allows you to insert the IDs, last names and job ids of the sales staff from the view if it is used in
multitable INSERT statements.

Explicación

Pregunta 24 de 71

View the Exhibit and examine the structure of EMPLOYEES and JOB_HISTORY tables. The EMPLOYEES
table maintains the most recent information regarding salary, department, and job for all the employees. The
JOB_HISTORY table maintains the record for all the job changes for the employees. You want to delete all
the records from the JOB_HISTORY table that are repeated in the EMPLOYEES table. Which two SQL
statements can you execute to accomplish the task? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

DELETE
FROM job_history j
WHERE employee_id =
(SELECT employee_id
FROM employees e
WHERE j.employee_id = e.employee_id) AND job_id = (SELECT job_id FROM employees e
WHERE j.job_id = e.job_id);
DELETE
FROM job_history j
WHERE (employee_id, job_id) = ALL
(SELECT employee_id, job_id
FROM employees e
WHERE j.employee_id = e.employee_id and j.job_id = e.job_id )
DELETE
FROM job_history j
WHERE employee_id =
(SELECT employee_id
FROM employees e
WHERE j.employee_id = e.employee_id and j.job_id = e.job_id )
DELETE
FROM job_history j
WHERE (employee_id, job_id) =
(SELECT employee_id, job_id
FROM employees e
WHERE j.employee_id = e.employee_id and j.job_id = e.job_id )

Explicación

Pregunta 25 de 71

The user SCOTT who is the owner of ORDERS and ORDER_ITEMS tables issues the following GRANT
command:
GRANT ALL
ON orders, order_items
TO PUBLIC;
What correction needs to be done to the above statement?

Selecciona una de las siguientes respuestas posibles:

PUBLIC should be replaced with specific usernames.
ALL should be replaced with a list of specific privileges.
WITH GRANT OPTION should be added to the statement.
Separate GRANT statements are required for ORDERS and ORDER_ITEMS tables.

Explicación

Pregunta 26 de 71

Given below is a list of functions and the tasks performed by using these functions, in random order. Function
Usage
1) LPAD a) Used to truncate a column, expression, or value to n decimal places
2) TRUNC b) Used to remove heading or trailing or both characters from the character string
3) DECODE c) Pads the character value right-justified to a total width of n character positions
4) TRIM d) Used to return the numeric value for position of a named character from the character string
5) INSTR e) Used to translate an expression after comparing it with each search value
Which option correctly matches the function names with their usage?

Selecciona una de las siguientes respuestas posibles:

1-c, 2-b, 3-e, 4-a, 5-d
1-e, 2-b, 3-c, 4-a, 5-d
1-e, 2-a, 3-c, 4-d, 5-b
1-c, 2-a, 3-e, 4-b, 5-d

Explicación

Pregunta 27 de 71

Which statement is true regarding the CUBE operator in the GROUP BY clause of a SQL statement?

Selecciona una de las siguientes respuestas posibles:

It produces only aggregates for the groups specified in the GROUP BY clause.
It finds all the NULL values in the superaggregates for the groups specified in the GROUP BY clause.
It produces 2 n possible superaggregate combinations, if the n columns and expressions are specified in
the GROUP BY clause.
It produces n+1 possible superaggregate combinations, if the n columns and expressions are specified in
the GROUP BY clause.

Explicación

Pregunta 28 de 71

Which statement is true regarding the SESSION_PRIVS dictionary view?

Selecciona una de las siguientes respuestas posibles:

It contains the current object privileges available in the user session.
It contains the current system privileges available in the user session.
It contains the object privileges granted to other users by the current user session.
It contains the system privileges granted to other users by the current user session.

Explicación

Pregunta 29 de 71

View the Exhibit and examine the details for the CATEGORIES_TAB table.
Evaluate the following incomplete SQL statement:
SELECT category_name,category_description
FROM categories_tab
You want to display only the rows that have 'harddisks' as part of the string in the
CATEGORY_DESCRIPTION column.
Which two WHERE clause options can give you the desired result? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

WHERE REGEXP_LIKE (category_description, 'hard+.s');
WHERE REGEXP_LIKE (category_description, '^H|hard+.s');
WHERE REGEXP_LIKE (category_description, '^H|hard+.s$');
WHERE REGEXP_LIKE (category_description, '[^H|hard+.s]');

Explicación

Pregunta 30 de 71

Which two statements are true regarding roles? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

A role can be granted to itself.
A role can be granted to PUBLIC.
A user can be granted only one role at any point of time.
The REVOKE command can be used to remove privileges but not roles from other users.
Roles are named groups of related privileges that can be granted to users or other roles.

Explicación

Pregunta 31 de 71

View the Exhibit and examine the data in the CUST_DET table.
INSERT FIRST
WHEN credit_limit >= 5000 THEN
INTO cust_1 VALUES(cust_id, credit_limit, grade, gender) WHEN grade = THEN
INTO cust_2 VALUES(cust_id, credit_limit, grade, gender) WHEN grade = THEN
INTO cust_3 VALUES(cust_id, credit_limit, grade, gender) INTO cust_4 VALUES(cust_id, credit_limit, grade,
gender) ELSE
INTO cust_5 VALUES(cust_id, credit_limit, grade, gender) SELECT * FROM cust_det;
The row will be inserted in _______.

Selecciona una de las siguientes respuestas posibles:

CUST_1 table only because CREDIT_LIMIT condition is satisfied
CUST_1 and CUST_2 tables because CREDIT_LIMIT and GRADE conditions are satisfied
CUST_1,CUST_2 and CUST_5 tables because CREDIT_LIMIT and GRADE conditions are satisfied but
GENDER condition is not satisfied
CUST_1, CUST_2 and CUST_4 tables because CREDIT_LIMIT and GRADE conditions are satisfied for
CUST_1 and CUST_2, and CUST_4 has no condition on it

Explicación

Pregunta 32 de 71

View the Exhibit and examine the data in the EMPLOYEES tables.
SELECT employee_id, department_id
FROM employees
WHERE department_id= 50 ORDER BY department_id
UNION
SELECT employee_id, department_id
FROM employees
WHERE department_id= 90
UNION
SELECT employee_id, department_id
FROM employees
WHERE department_id= 10;
What would be the outcome of the above SQL statement?

Selecciona una de las siguientes respuestas posibles:

The statement would execute successfully and display all the rows in the ascending order of
DEPARTMENT_ID.
The statement would execute successfully but it will ignore the ORDER BY clause and display the rows in
random order.
The statement would not execute because the positional notation instead of the column name should be
used with the ORDER BY clause.
The statement would not execute because the ORDER BY clause should appear only at the end of the
SQL statement, that is, in the last SELECT statement.

Explicación

Pregunta 33 de 71

Evaluate the SQL statements:
CREATE TABLE new_order
(orderno NUMBER(4),
booking_date TIMESTAMP WITH LOCAL TIME ZONE);
The database is located in San Francisco where the time zone is -8:00. The user is located in New York where
the time zone is -5:00. A New York user inserts the following record:
INSERT INTO new_order
VALUES(1, TIMESTAMP ?007-05-10 6:00:00 -5:00?);
Which statement is true?

Selecciona una de las siguientes respuestas posibles:

When the New York user selects the row, booking_date is displayed as '007-05-10 3.00.00.000000'
When the New York user selects the row, booking_date is displayed as '2007-05-10 6.00.00.000000 -
5:00'.
When the San Francisco user selects the row, booking_date is displayed as '007-05-10 3.00.00.000000'
When the San Francisco user selects the row, booking_date is displayed as '007-05-10 3.00.00.000000 -
8:00'

Explicación

Pregunta 34 de 71

Which statements are true? (Choose all that apply.)

Selecciona una o más de las siguientes respuestas posibles:

The data dictionary is created and maintained by the database administrator.
The data dictionary views can consist of joins of dictionary base tables and user-defined tables.
The usernames of all the users including the database administrators are stored in the data dictionary.
The USER_CONS_COLUMNS view should be queried to find the names of the columns to which a
constraint applies.
Both USER_OBJECTS and CAT views provide the same information about all the objects that are owned
by the user
Views with the same name but different prefixes, such as DBA, ALL and USER, use the same base tables
from the data dictionary

Explicación

Pregunta 35 de 71

View the Exhibit and examine the details of the PRODUCT_INFORMATION table. You have the requirement
to display PRODUCT_NAME and LIST_PRICE from the table where the CATEGORY_ID column has values
12 or 13, and the SUPPLIER_ID column has the value 102088. You executed the following SQL statement:
SELECT product_name, list_price
FROM product_information
WHERE (category_id = 12 AND category_id = 13) AND supplier_id = 102088;
Which statement is true regarding the execution of the query?

Selecciona una de las siguientes respuestas posibles:

It would execute but the output would return no rows.
It would execute and the output would display the desired result.
It would not execute because the entire WHERE clause condition is not enclosed within the parentheses.
It would not execute because the same column has been used in both sides of the AND logical operator to
form the condition.

Explicación

Pregunta 36 de 71

Given below is the list of meta character syntaxes and their descriptions in random order:
Meta character syntax Description
1) ^ a) Matches character not in the list
2) [^...] b) Matches character when it occurs at the beginning of a line
3) | c) Treats the subsequent meta character as a literal
4) \ d) Matches one of the characters such as the OR operator
Identify the option that correctly matches the meta character syntaxes with their descriptions.

Selecciona una de las siguientes respuestas posibles:

1-b, 2-a, 3-d, 4-c
1-a, 2-b, 3-d, 4-c
1-d, 2-b, 3-a, 4-c
1-b, 2-c, 3-d, 2-a

Explicación

Pregunta 37 de 71

View the Exhibit and examine the structure of ORDERS and CUSTOMERS tables. Evaluate the following
UPDATE statement:
UPDATE
(SELECT order_date, order_total, customer_id
FROM orders)
SET order_date = '22-mar-2007'
WHERE customer_id =
(SELECT customer_id
FROM customers
WHERE cust_last_name = 'Roberts' AND
credit_limit = 600);
Which statement is true regarding the execution of the above UPDATE statement?

Selecciona una de las siguientes respuestas posibles:

It would not execute because two tables cannot be used in a single UPDATE statement.
It would execute and restrict modifications to only the columns specified in the SELECT statement.
It would not execute because a subquery cannot be used in the WHERE clause of an UPDATE statement.
It would not execute because the SELECT statement cannot be used in place of the table name.

Explicación

Pregunta 38 de 71

Which statement correctly differentiates a system privilege from an object privilege?

Selecciona una de las siguientes respuestas posibles:

System privileges can be granted only by the DBA whereas object privileges can be granted by DBAs or
the owner of the object.
System privileges give the rights to only create user schemas whereas object privileges give rights to
manipulate objects in a schema.
Users require system privileges to gain access to the database whereas they require object privileges to
create objects in the database.
A system privilege is the right to perform specific activities in a database whereas an object privilege is a
right to perform activities on a specific object in the database.

Explicación

Pregunta 39 de 71

View the Exhibit and examine the data in the PRODUCT_INFORMATION table. Which two tasks would
require subqueries? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

displaying the minimum list price for each product status
displaying all supplier IDs whose average list price is more than 500
displaying the number of products whose list prices are more than the average list price
displaying all the products whose minimum list prices are more than the average list price of products
having the product status orderable
displaying the total number of products supplied by supplier 102071 and having product status
OBSOLETE

Explicación

Pregunta 40 de 71

Which two statements are true regarding constraints? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

A foreign key cannot contain NULL values.
A column with the UNIQUE constraint can contain NULL.
A constraint is enforced only for the INSERT operation on a table.
A constraint can be disabled even if the constraint column contains data.
All the constraints can be defined at the column level as well as the table level.

Explicación

Pregunta 41 de 71

View the Exhibit and examine the description of the ORDER_ITEMS table. The following SQL statement was
written to retrieve the rows for the PRODUCT_ID that has a UNIT_PRICE of more than 1,000 and has been
ordered more than five times:
SELECT product_id, COUNT(order_id) total, unit_price FROM order_items
WHERE unit_price>1000 AND COUNT(order_id)>5
GROUP BY product_id, unit_price;
Which statement is true regarding this SQL statement?

Selecciona una de las siguientes respuestas posibles:

The statement would execute and give you the desired result.
The statement would not execute because the aggregate function is used in the WHERE clause.
The statement would not execute because the WHERE clause should have the OR logical operator
instead of AND.
The statement would not execute because in the SELECT clause, the UNIT_PRICE column is placed after
the column having the aggregate function.

Explicación

Pregunta 42 de 71

Which two statements best describe the benefits of using the WITH clause? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

It enables users to store the results of a query permanently.
It enables users to store the query block permanently in the memory and use it to create complex queries.
It enables users to reuse the same query block in a SELECT statement, if it occurs more than once in a
complex query.
It can improve the performance of a large query by storing the result of a query block having the WITH
clause in the user's temporary tablespace.

Explicación

Pregunta 43 de 71

View the Exhibit and examine the structure of the ORDERS and ORDER_ITEMS tables. In the ORDERS
table, ORDER_ID is the PRIMARY KEY and ORDER_DATE has the DEFAULT value as SYSDATE. Evaluate
the following statement:
UPDATE orders
SET order_date=DEFAULT
WHERE order_id IN (SELECT order_id FROM order_items WHERE qty IS NULL);
What would be the outcome of the above statement?

Selecciona una de las siguientes respuestas posibles:

The UPDATE statement would not work because the main query and the subquery use different tables.
The UPDATE statement would not work because the DEFAULT value can be used only in INSERT
statements.
The UPDATE statement would change all ORDER_DATE values to SYSDATE provided the current
ORDER_DATE is NOT NULL and QTY is NULL.
The UPDATE statement would change all the ORDER_DATE values to SYSDATE irrespective of what the
current ORDER_DATE value is for all orders where QTY is NULL.

Explicación

Pregunta 44 de 71

View the Exhibit and examine the description of the EMPLOYEES table.
Evaluate the following SQL statement:
SELECT employee_id, last_name, job_id, manager_id, LEVEL
FROM employees
START WITH employee_id = 101
CONNECT BY PRIOR employee_id=manager_id ;
Which two statements are true regarding the output of this command? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

The output would be in top-down hierarchy starting with EMPLOYEE_ID having value 101.
The output would be in bottom-up hierarchy starting with EMPLOYEE_ID having value 101.
The LEVEL column displays the number of employees in the hierarchy under the employee having the
EMPLOYEE_ID 101.
The LEVEL column displays the level in the hierarchy at which the employee is placed under the
employee having the EMPLOYEE_ID 101.

Explicación

Pregunta 45 de 71

Which three statements are true regarding the WHERE and HAVING clauses in a SQL statement? (Choose
three.)

Selecciona una o más de las siguientes respuestas posibles:

The HAVING clause conditions can have aggregate functions.
The HAVING clause conditions can use aliases for the columns.
WHERE and HAVING clauses cannot be used together in a SQL statement.
The WHERE clause is used to exclude rows before the grouping of data.
The HAVING clause is used to exclude one or more aggregated results after grouping data.

Explicación

Pregunta 46 de 71

The first DROP operation is performed on PRODUCTS table using the following command:
DROP TABLE products PURGE;
Then you performed the FLASHBACK operation by using the following command:
FLASHBACK TABLE products TO BEFORE DROP;
Which statement describes the outcome of the FLASHBACK command?

Selecciona una de las siguientes respuestas posibles:

It recovers only the table structure
It recovers the table structure, data, and the indexes.
It recovers the table structure and data but not the related indexes.
It is not possible to recover the table structure, data, or the related indexes.

Explicación

Pregunta 47 de 71

Which statements are true regarding the usage of the WITH clause in complex correlated subqueries?
(Choose all that apply.)

Selecciona una o más de las siguientes respuestas posibles:

It can be used only with the SELECT clause.
The WITH clause can hold more than one query.
If the query block name and the table name were the same, then the table name would take precedence
The query name in the WITH clause is visible to other query blocks in the WITH clause as well as to the
main query block.

Explicación

Pregunta 48 de 71

Evaluate the following SQL statement:
CREATE INDEX upper_name_idx
ON product_information(UPPER(product_name));
Which query would use the UPPER_NAME_IDX index?

Selecciona una de las siguientes respuestas posibles:

SELECT UPPER(product_name)
FROM product_information
WHERE product_id = 2254;
SELECT UPPER(product_name)
FROM product_information;
SELECT product_id
FROM product_information
WHERE UPPER(product_name) IN ('LASERPRO', 'Cable');
SELECT product_id, UPPER(product_name)
FROM product_information
WHERE UPPER(product_name)='LASERPRO' OR list_price > 1000;

Explicación

Pregunta 49 de 71

Which three statements are true regarding group functions? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

They can be used on columns or expressions.
They can be passed as an argument to another group function.
They can be used only with a SQL statement that has the GROUP BY clause.
They can be used on only one column in the SELECT clause of a SQL statement.
They can be used along with the single-row function in the SELECT clause of a SQL statement.

Explicación

Pregunta 50 de 71

Which three statements are true regarding single-row functions? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

They can accept only one argument.
They can be nested up to only two levels.
They can return multiple values of more than one data type.
They can be used in SELECT, WHERE, and ORDER BY clauses.
They can modify the data type of the argument that is referenced
They can accept a column name, expression, variable name, or a user-supplied constant as arguments.

Explicación

Pregunta 51 de 71

Which view would you use to display the column names and DEFAULT values for a table?

Selecciona una de las siguientes respuestas posibles:

DBA_TABLES
DBA_COLUMNS
USER_COLUMNS
USER_TAB_COLUMNS

Explicación

Pregunta 52 de 71

View the Exhibit and examine the structure for the ORDERS and ORDER_ITEMS tables. You want to display
ORDER_ID, PRODUCT_ID, and TOTAL (UNIT_PRICE multiplied by QUANTITY) for all the orders placed in
the last seven days. Which query would you execute?

Selecciona una de las siguientes respuestas posibles:

SELECT order_id, product_id, unit_price*quantity "TOTAL" FROM order_items oi JOIN orders o
ON (o.order_id=oi.order_id)
WHERE o.order_date>=SYSDATE-7;
SELECT o.order_id,oi.product_id, oi.unit_price*oi.quantity " TOTAL" FROM order_items oi JOIN orders o
USING (order_id)
WHERE o.order_date>=SYSDATE-7;
SELECT o.order_id, oi.product_id, oi.unit_price*oi.quantity "TOTAL" FROM order_items oi JOIN orders o
WHERE o.order_date>=SYSDATE-7
ON (o.order_id=oi.order_id);
SELECT o.order_id, oi.product_id, oi.unit_price*oi.quantity "TOTAL" FROM order_items oi JOIN orders o
ON (o.order_id=oi.order_id)
WHERE o.order_date>=SYSDATE-7;

Explicación

Pregunta 53 de 71

Which three statements are true? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

Only one LONG column can be used per table.
A TIMESTAMP data type column stores only time values with fractional seconds.
The BLOB data type column is used to store binary data in an operating system file.
The minimum column width that can be specified for a varchar2 data type column is one.
The value for a CHAR data type column is blank-padded to the maximum defined column width.

Explicación

Pregunta 54 de 71

Which two statements are true regarding subqueries? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Only two subqueries can be placed at one level.
A subquery can be used to access data from one or more tables or views.
If the subquery returns 0 rows, then the value returned by the subquery expression is NULL.
The columns in a subquery must always be qualified with the name or alias of the table used.
A subquery in the WHERE clause of a SELECT statement can be nested up to three levels only.

Explicación

Pregunta 55 de 71

View the Exhibit and examine the description of the PRODUCT_INFORMATION table.
SELECT product_name, list_price, min_price, list_price - min_price Difference FROM product_information;
Which options when used with the above SQL statement can produce the sorted output in ascending order of
the price difference between LIST_PRICE and MIN_PRICE? (Choose all that apply.)

Selecciona una o más de las siguientes respuestas posibles:

ORDER BY 4
ORDER BY MIN_PRICE
ORDER BY DIFFERENCE
ORDER BY LIST_PRICE
ORDER BY LIST_PRICE - MIN_PRICE

Explicación

Pregunta 56 de 71

Evaluate the following statement:
INSERT ALL
WHEN order_total < 10000 THEN
INTO small_orders
WHEN order_total > 10000 AND order_total < 20000 THEN INTO medium_orders
WHEN order_total > 2000000 THEN
INTO large_orders
SELECT order_id, order_total, customer_id
FROM orders;
Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement?

Selecciona una de las siguientes respuestas posibles:

They are evaluated by all the three WHEN clauses regardless of the results of the evaluation of any other
WHEN clause.
They are evaluated by the first WHEN clause. If the condition is true, then the row would be evaluated by
the subsequent WHEN clauses.
They are evaluated by the first WHEN clause. If the condition is false, then the row would be evaluated by
the subsequent WHEN clauses.
The INSERT statement would give an error because the ELSE clause is not present for support in case
none of the WHEN clauses are true.

Explicación

Pregunta 57 de 71

Which three possible values can be set for the TIME_ZONE session parameter by using the ALTER
SESSION command? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

'os'
local
'-8:00'
dbtimezone
'Australia'

Explicación

Pregunta 58 de 71

View the Exhibit and examine the structure of the ORDER_ITEMS table. Examine the following SQL
statement:
SELECT order_id, product_id, unit_price
FROM order_items
WHERE unit_price = (SELECT MAX(unit_price) FROM order_items GROUP BY order_id);
You want to display the PRODUCT_ID of the product that has the highest UNIT_PRICE per ORDER_ID.
What correction should be made in the above SQL statement to achieve this?

Selecciona una de las siguientes respuestas posibles:

Replace = with the IN operator.
Replace = with the >ANY operator.
Replace = with the >ALL operator.
Remove the GROUP BY clause from the subquery and place it in the main query.

Explicación

Pregunta 59 de 71

View the Exhibit and examine the table structure of DEPARTMENTS and LOCATIONS tables. You want to
display all the cities that have no departments and the departments that have not been allocated cities. Which
type of join between DEPARTMENTS and LOCATIONS tables would produce this information as part of its
output?

Selecciona una de las siguientes respuestas posibles:

NATURAL JOIN
FULL OUTER JOIN
LEFT OUTER JOIN
RIGHT OUTER JOIN

Explicación

Pregunta 60 de 71

View the Exhibit and examine the description of the ORDERS table. Your manager asked you to get the
SALES_REP_ID and the total numbers of orders placed by each of the sales representatives. Which
statement would provide the desired result?

Selecciona una de las siguientes respuestas posibles:

SELECT sales_rep_id, COUNT(order_id) total_orders
FROM orders
GROUP BY sales_rep_id;
SELECT sales_rep_id, COUNT(order_id) total_orders
FROM orders
GROUP BY sales_rep_id, total_orders;
SELECT sales_rep_id, COUNT(order_id) total_orders
FROM orders;
SELECT sales_rep_id, COUNT(order_id) total_orders
FROM orders
WHERE sales_rep_id IS NOT NULL;

Explicación

Pregunta 61 de 71

View the Exhibit and examine the structure of ORDERS and CUSTOMERS tables. Which INSERT statement
should be used to add a row into the ORDERS table for the customer whose CUST_LAST_NAME is Roberts
and CREDIT_LIMIT is 600?

Selecciona una de las siguientes respuestas posibles:

INSERT INTO orders
VALUES (1,'10-mar-2007', 'direct',
(SELECT customer_id
FROM customers
WHERE cust_last_name='Roberts' AND
credit_limit=600), 1000);
INSERT INTO orders (order_id,order_date,order_mode, (SELECT customer_id
FROM customers
WHERE cust_last_name='Roberts' AND
credit_limit=600),order_total)
VALUES(1,'10-mar-2007', 'direct', &&customer_id, 1000);
INSERT INTO orders (order_id,order_date,order_mode, (SELECT customer_id
FROM customers
WHERE cust_last_name='Roberts' AND
credit_limit=600),order_total)
VALUES(1,'10-mar-2007', 'direct', &customer_id, 1000);
INSERT INTO(SELECT o.order_id, o.order_date,o.order_mode,c.customer_id,
order_total
FROM orders o, customers c
WHERE o.customer_id = c.customer_id
AND c.cust_last_name='Roberts' ANDc.credit_limit=600 ) VALUES (1,'10-mar-2007', 'direct',(SELECT
customer_id FROM customers WHERE cust_last_name='Roberts' AND credit_limit=600), 1000);

Explicación

Pregunta 62 de 71

Evaluate the following SQL statement:
SELECT product_name || 'it's not available for order' FROM product_information
WHERE product_status = 'obsolete';
You received the following error while executing the above query:
ERROR:
ORA-01756: quoted string not properly terminated
What would you do to execute the query successfully?

Selecciona una de las siguientes respuestas posibles:

Enclose the character literal string in the SELECT clause within the double quotation marks.
Do not enclose the character literal string in the SELECT clause within the single quotation marks.
Use Quote (q) operator and delimiter to allow the use of single quotation mark in the literal character
string.
Use escape character to negate the single quotation mark inside the literal character string in the
SELECT clause.

Explicación

Pregunta 63 de 71

View the Exhibit and examine the data in EMPLOYEES and DEPARTMENTS tables. In the EMPLOYEES
table EMPLOYEE_ID is the PRIMARY KEY and DEPARTMENT_ID is the FOREIGN KEY. In the
DEPARTMENTS table DEPARTMENT_ID is the PRIMARY KEY.
Evaluate the following UPDATE statement:
UPDATE employees a
SET department_id = (SELECT department_id FROM departments WHERE location_id = '2100'),
(salary, commission_pct) = (SELECT 1.1AVG(salary), 1.5AVG(commission_pct) FROM employees b
WHERE a.department_id = b.department_id)
WHERE first_name||' '||last_name = 'Amit Banda';
What would be the outcome of the above statement? What would be the outcome of the above statement?

Selecciona una de las siguientes respuestas posibles:

It would execute successfully and update the relevant data.
It would not execute successfully because there is no LOCATION_ID 2100 in the DEPARTMENTS table.
It would not execute successfully because the condition specified with the concatenation operator is not
valid.
It would not execute successfully because multiple columns (SALARY,COMMISSION_PCT)cannot be
used in an UPDATE statement.

Explicación

Pregunta 64 de 71

View the Exhibit and examine the description of the ORDERS table. You need to display CUSTOMER_ID for
all customers who have placed orders more than three times in the last six months. You issued the following
SQL statement:
SELECT customer_id,COUNT(order_id)
FROM orders
WHERE COUNT(order_id)>3 AND
order_date BETWEEN ADD_MONTHS(SYSDATE,-6) AND SYSDATE GROUP BY customer_id;
Which statement is true regarding the execution of the above statement?

Selecciona una de las siguientes respuestas posibles:

It would execute successfully and provide the desired result.
It would not execute because the WHERE clause cannot have an aggregate function.
It would not execute because the ORDER_ID column is not included in the GROUP BY clause.
It would not execute because the GROUP BY clause should be placed before the WHERE clause.

Explicación

Pregunta 65 de 71

View the Exhibit and examine the data in the PRODUCTS table. Which statement would add a column called
PRICE, which cannot contain NULL?

Selecciona una de las siguientes respuestas posibles:

ALTER TABLE products
ADD price NUMBER(8,2) NOT NULL;
ALTER TABLE products
ADD price NUMBER(8,2) DEFAULT NOT NULL;
ALTER TABLE products
ADD price NUMBER(8,2) DEFAULT 0 NOT NULL;
ALTER TABLE products
ADD price NUMBER(8,2) DEFAULT CONSTRAINT p_nn NOT NULL;

Explicación

Pregunta 66 de 71

View the Exhibit and examine the structure of the ORD table. Evaluate the following SQL statements that are
executed in a user session in the specified order:
CREATE SEQUENCE ord_seq;
SELECT ord_seq.nextval
FROM dual;
INSERT INTO ord
VALUES (ord_seq.CURRVAL, '25-jan-2007',101);
UPDATE ord
SET ord_no= ord_seq.NEXTVAL
WHERE cust_id =101;
What would be the outcome of the above statements?

Selecciona una de las siguientes respuestas posibles:

All the statements would execute successfully and the ORD_NO column would contain the value 2 for the
CUST_ID 101.
The CREATE SEQUENCE command would not execute because the minimum value and maximum value
for the sequence have not been specified.
The CREATE SEQUENCE command would not execute because the starting value of the sequence and
the increment value have not been specified.
All the statements would execute successfully and the ORD_NO column would have the value 20 for the
CUST_ID 101 because the default CACHE value is 20.

Explicación

Pregunta 67 de 71

ORD is a private synonym for the OE.ORDERS table. The user OE issues the following command:
DROP SYNONYM ord;
Which statement is true regarding the above SQL statement?

Selecciona una de las siguientes respuestas posibles:

Only the synonym would be dropped.
The synonym would be dropped and the corresponding table would become invalid.
The synonym would be dropped and the packages referring to the synonym would be dropped.
The synonym would be dropped and any PUBLIC synonym with the same name becomes invalid.

Explicación

Pregunta 68 de 71

View the Exhibit and examine the structure of the ORDERS table. Which task would require subqueries?

Selecciona una de las siguientes respuestas posibles:

displaying the total order value for sales representatives 161 and 163
displaying the order total for sales representative 161 in the year 1999
displaying the number of orders that have order mode online and order date in 1999
displaying the number of orders whose order total is more than the average order total for all online orders

Explicación

Pregunta 69 de 71

View the Exhibit and examine the details of the EMPLOYEES table. Evaluate the following SQL statements:
Statement 1:
SELECT employee_id, last_name, job_id, manager_id
FROM employees
START WITH employee_id = 101
CONNECT BY PRIOR employee_id = manager_id AND manager_id != 108 ;
Statement 2:
SELECT employee_id, last_name, job_id, manager_id
FROM employees
WHERE manager_id != 108
START WITH employee_id = 101
CONNECT BY PRIOR employee_id = manager_id;
Which two statements are true regarding the above SQL statements? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Statement 2 would not execute because the WHERE clause condition is not allowed in a statement that
has the START WITH clause.
The output for statement 1 would display the employee with MANAGER_ID 108 and all the employees
below him or her in the hierarchy.
The output of statement 1 would neither display the employee with MANAGER_ID 108 nor any employee
below him or her in the hierarchy.
The output for statement 2 would not display the employee with MANAGER_ID 108 but it would display all
the employees below him or her in the hierarchy.

Explicación

Pregunta 70 de 71

Which SQL statement would display the view names and definitions of all the views owned by you?

Selecciona una de las siguientes respuestas posibles:

SELECT view_name, text
FROM user_view;
SELECT view_name, text
FROM user_object ;
SELECT view_name, text
FROM user_objects;
SELECT view_name, text
FROM user_views;

Explicación

Pregunta 71 de 71

View the Exhibit button and examine the structures of ORDERS and ORDER_ITEMS tables. In the ORDERS
table, ORDER_ID is the PRIMARY KEY and in the ORDER_ITEMS table, ORDER_ID and LINE_ITEM_ID
form the composite primary key. Which view can have all the DML operations performed on it?

Selecciona una de las siguientes respuestas posibles:

CREATE VIEW V1
AS SELECT order_id, product_id
FROM order_items;
CREATE VIEW V4(or_no, or_date, cust_id)
AS SELECT order_id, order_date, customer_id
FROM orders
WHERE order_date < '30-mar-2007' WITH CHECK OPTION;
CREATE VIEW V3
AS SELECT o.order_id, o.customer_id, i.product_id
FROM orders o, order_items i
WHERE o.order_id=i.order_id;
CREATE VIEW V2
AS SELECT order_id, line_item_id, unit_price*quantity total FROM order_items;

Explicación

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	Creado por Jan Kubec hace más de 10 años

dalsi otazky ze souboru

Oracle SQL Expert Certification - Part II

Pregunta 1 de 71

Evaluate the following ALTER TABLE statement: ALTER TABLE orders SET UNUSED order_date; Which statement is true?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 71

View the Exhibit and examine the ORDERS table. The ORDERS table contains data and all orders have been assigned a customer ID. Which statement would add a NOT NULL constraint to the CUSTOMER_ID column?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 71

Which three statements indicate the end of a transaction? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 71

View the Exhibit and examine the structure of the ORDERS table. You have to display ORDER_ID, ORDER_DATE, and CUSTOMER_ID for all those orders that were placed after the last order placed by the customer whose CUSTOMER_ID is 101. Which query would give you the desired output?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 71

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 6 de 71

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 71

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 71

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 71

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 71

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Pregunta 11 de 71

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Pregunta 12 de 71

View the Exhibit and examine the data in the LOCATIONS table. Evaluate the following SQL statement: SELECT street_address FROM locations WHERE REGEXP_INSTR(street_address,'[^[:alpha:]]') = 1; Which statement is true regarding the output of this SQL statement?

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Explicación

Pregunta 13 de 71

Evaluate the following expression using meta character for regular expression: '[^Ale|ax.r$]' Which two matches would be returned by this expression? (Choose two.)

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Explicación

Pregunta 14 de 71

The ORDERS table belongs to the user OE. OE has granted the SELECT privilege on the ORDERS table to the user HR. Which statement would create a synonym ORD so that HR can execute the following query successfully? SELECT * FROM ord;

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Pregunta 15 de 71

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Pregunta 16 de 71

Evaluate the following DELETE statement: DELETE FROM orders; There are no other uncommitted transactions on the ORDERS table. Which statement is true about the DELETE statement?

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Explicación

Pregunta 17 de 71

View the Exhibit and examine the structure of ORDERS and ORDER_ITEMS tables. ORDER_ID is the primary key in the ORDERS table. It is also the foreign key in the ORDER_ITEMS table wherein it is created with the ON DELETE CASCADE option. Which DELETE statement would execute successfully?

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Pregunta 18 de 71

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Pregunta 19 de 71

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Pregunta 20 de 71

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Pregunta 21 de 71

Which two statements are true regarding the GROUP BY clause in a SQL statement? (Choose two.)

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Pregunta 22 de 71

Which statement is true regarding synonyms?

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Explicación

Pregunta 23 de 71

Evaluate the following ALTER TABLE statement:
ALTER TABLE orders
SET UNUSED order_date;
Which statement is true?

View the Exhibit and examine the ORDERS table. The ORDERS table contains data and all orders have been
assigned a customer ID. Which statement would add a NOT NULL constraint to the CUSTOMER_ID column?

View the Exhibit and examine the structure of the ORDERS table. You have to display ORDER_ID,
ORDER_DATE, and CUSTOMER_ID for all those orders that were placed after the last order placed by the
customer whose CUSTOMER_ID is 101. Which query would give you the desired output?

View the Exhibit and examine the data in the LOCATIONS table. Evaluate the following SQL statement:
SELECT street_address
FROM locations
WHERE
REGEXP_INSTR(street_address,'[^[:alpha:]]') = 1;
Which statement is true regarding the output of this SQL statement?

Evaluate the following expression using meta character for regular expression:
'[^Ale|ax.r$]'
Which two matches would be returned by this expression? (Choose two.)

The ORDERS table belongs to the user OE. OE has granted the SELECT privilege on the ORDERS table to
the user HR. Which statement would create a synonym ORD so that HR can execute the following query
successfully?
SELECT * FROM ord;

Evaluate the following DELETE statement:
DELETE FROM orders;
There are no other uncommitted transactions on the ORDERS table.
Which statement is true about the DELETE statement?

View the Exhibit and examine the structure of ORDERS and ORDER_ITEMS tables.
ORDER_ID is the primary key in the ORDERS table. It is also the foreign key in the ORDER_ITEMS table
wherein it is created with the ON DELETE CASCADE option. Which DELETE statement would execute
successfully?

The user SCOTT who is the owner of ORDERS and ORDER_ITEMS tables issues the following GRANT
command:
GRANT ALL
ON orders, order_items
TO PUBLIC;
What correction needs to be done to the above statement?