SQL>
SQL> DECLARE
2 Type t_FirstNameTable IS TABLE OF VARCHAR(20)
3 INDEX BY BINARY_INTEGER;
4 FirstNames t_FirstNameTable;
5 BEGIN
6 -- Insert rows into the table.
7 FirstNames(1) := 'Scott';
8 FirstNames(3) := 'Joanne';
9
10 -- Check to see if rows exist.
11 IF FirstNames.EXISTS(1) THEN
12 DBMS_OUTPUT.put_line('Row 1 exists!');
13 ELSE
14 DBMS_OUTPUT.put_line('Row 1 doesn''t exist!');
15 END IF;
16 IF FirstNames.EXISTS(2) THEN
17 DBMS_OUTPUT.put_line('Row 2 exists!');
18 ELSE
19 DBMS_OUTPUT.put_line('Row 2 doesn''t exist!');
20 END IF;
21 END;
22 /
Row 1 exists!
Row 2 doesn't exist!
PL/SQL procedure successfully completed.
SQL>