SQL>
SQL> -- Demonstration of string comparison.
SQL> SET SERVEROUTPUT ON
SQL> DECLARE
2 fixed_length_10 CHAR(10);
3 fixed_length_20 CHAR(20);
4 var_length_10 VARCHAR2(10);
5 var_length_20 VARCHAR2(20);
6 BEGIN
7
8 --Comparison of a fixed length string and a literal also
9 -- results in the use of blank-padded comparison semantics.
10 IF fixed_length_10 = 'Donna' THEN
11 DBMS_OUTPUT.PUT_LINE('Char and constant:' || fixed_length_10 ||' = ' || 'Donna');
12 ELSE
13 DBMS_OUTPUT.PUT_LINE('Not Donna');
14 END IF;
15 END;
16 /
Not Donna
PL/SQL procedure successfully completed.
SQL>