Flashcards
Sem título
Flashcards do conjunto (24)
- 1What is a database?An organised collection of related data.
- 2What 4 things can you do with data from a database?-Add
-Edit
-Manage
-Retrieve - 3What are the 10 data types?1. Number (integer)
2. Number (real)
3. String (text)
4. Date/Time
5. Currency
6. Boolean
7. Lists
8. Picture
9. Sound
10. Video - 4What is a field?A single item of data within a record.
- 5What is a record?A collection of related fields.
- 6What is a file?A file is a collection of related records.
- 7What is a key field?A key field unique identifies each record. No two records have the same data in their key fields.
- 8What do validation methods do?Ensure that data entered is reasonable and sensible.
- 9What do validation rules do?As data is entered it is checked to see that it obeys the validation rules; any data that doesn't is not accepted.
- 10Name 6 validation methods.1. Range check
2. Type check
3. Format/Picture check
4. Length check
5. Presence check
6. Lookup list - 11What does a range check do?Ensures that data entered is within a required range.
- 12What do type checks do?Ensures data is of the correct type.
- 13What does a format/picture check do?Checks that data entered follows a specific pattern/rule if required.
- 14What does a length check do?Checks the length of the input is correct.
- 15What does a presence check do?Ensures that all data that has to be entered is entered.
- 16What is a lookup list?If the data entered consists of a limited number of possible entries then the computer can compare the entry with a list of allowed answers.
- 17What is a report?A printed document that contains data from a database, organised and analysed in a certain way.
- 18What are form used for?Forms are used to make data entry more attractive and secure rather than entering data into raw tables.
- 19What are uses of databases?-Add, change, delete records.
-Search for a particular record.
-Sort the records into a given order.
-Print reports about some aspect of the database. - 20What do you use to search for information in a database?A query.
- 21What is a simple query search?A query that looks for data in one field.
- 22What is a complex query search?A query that looks at data with multiple criteria.
- 23How can you keep data secure?-Passwords
-Access rights
-Back-ups - 24What are 6 benefits of using a database?-Fast access
-Easy to edit
-Validation
-Reports
-Sharing
-Security
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- FlashCards sobre Sem título, criado por pavee004 em 13-02-2015.
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- pavee004
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