3. Which of the following statements are correct? (T/F)
- You can select from several database tables using a database view or a join. T - A secondary index for non-key fields generally works like a primary index for key fields. T - A key field in a database table uniquely identifies a data record. T - The client field is a selective field and should therefore always be specified in the WHERE condition for SELECT. F - The OPEN SQL statements are converted into database-specific statements by the database interface. T