Objects within a Database

Objects within a Database

1. Tables

   • Store the data itself

2. Queries

   • used to answer questions about the data. Can extract and display records which match certain criteria.
   • Queries answer questions about your data.
   • Can be used to alter, view and analyse data from one or more tables in a database
   • Can be used as the source of records in forms and reports
   • Only the required data is displayed
   • Can be saved for future
   • Wildcard symbols and maths operators can be used
     • Criteria can be combined e.g <5 and >12
     • * means to match any number of characters or none
     • ? matches exactly one character

3. Reports

   • Used to format the output of data from tables or queries in a user friendly way. Mainly for printing

4. Forms

   • Used to input and/or output data in a user friendly way for on screen use.
   • Allow records to be presented in a user friendly way
   • Text can be enhanced and additional text boards
   • forms can be used to both input and output data records
   • Allow command buttons to be added
     • create
     • save
     • clear/ delete
   • can be using a form editor
   • The best approach is to create a basic form using wizard and then modify it
   • Using forms
     • view
     • modify
     • save
     • delete
     • saves automatically