When declaring a PL/SQL variable to be the same structure and data types as a database table, you would use what?

The what operator can be used to test if a value is a member of a set.

T/F

A GROUP BY clause can only contain a single column.

A query of people contains the clause ORDER BY birthdate. This would list them from youngest to oldest.

PL/SQL blocks can use DDL commands.

Run-time errors are handled in a PL/SQL procedure in a TRY-CATCH block.