SQL>
SQL>
SQL> SET SERVEROUTPUT ON
SQL>
SQL> DECLARE
2 visibleValue VARCHAR2(30);
3 hiddenValue VARCHAR2(30);
4 BEGIN
5 visibleValue := 'visible';
6 hiddenValue := 'hidden';
7
8 DBMS_OUTPUT.PUT_LINE('OUTER BLOCK');
9 DBMS_OUTPUT.PUT_LINE(visibleValue);
10 DBMS_OUTPUT.PUT_LINE(hiddenValue);
11
12 DECLARE
13 hiddenValue NUMBER(10);
14 BEGIN
15 DBMS_OUTPUT.PUT_LINE('INNER BLOCK');
16 hiddenValue := 'inner hiddenValue';
17 DBMS_OUTPUT.PUT_LINE(hiddenValue);
18 EXCEPTION
19 WHEN OTHERS
20 THEN
21 DBMS_OUTPUT.PUT_LINE('hiddenValue of type VARCHAR2 was...hidden');
22 END;
23 END;
24 /
OUTER BLOCK
visible
hidden
INNER BLOCK
hiddenValue of type VARCHAR2 was...hidden
PL/SQL procedure successfully completed.