Use FOR LOOP to loop through dates : For LOOP « PL SQL Statements « Oracle PL/SQL Tutorial





SQL>
SQL> SET SERVEROUTPUT ON
SQL> DECLARE
  2    test_date     DATE;
  3    day_of_week   VARCHAR2(3);
  4    years_ahead   INTEGER;
  5  BEGIN
  6    test_date := TO_DATE('1-Jan-1997','dd-mon-yyyy');
  7
  8    FOR years_ahead IN 1..10 LOOP
  9      day_of_week := TO_CHAR(test_date,'Dy');
 10
 11      IF day_of_week IN ('Sat','Sun') THEN
 12        DBMS_OUTPUT.PUT_LINE(TO_CHAR(test_date,'dd-Mon-yyyy')|| '     A long weekend!');
 13      ELSE
 14        DBMS_OUTPUT.PUT_LINE(TO_CHAR(test_date,'dd-Mon-yyyy')|| ' Not a long weekend.');
 15      END IF;
 16      test_date := ADD_MONTHS(test_date,12);
 17    END LOOP;
 18  END;
 19  /
01-Jan-1997 Not a long weekend.
01-Jan-1998 Not a long weekend.
01-Jan-1999 Not a long weekend.
01-Jan-2000     A long weekend!
01-Jan-2001 Not a long weekend.
01-Jan-2002 Not a long weekend.
01-Jan-2003 Not a long weekend.
01-Jan-2004 Not a long weekend.
01-Jan-2005     A long weekend!
01-Jan-2006     A long weekend!

PL/SQL procedure successfully completed.

SQL>
SQL>










22.4.For LOOP
22.4.1.FOR Loops
22.4.2.FOR LOOP with loop counter
22.4.3.Nested FOR LOOP with Labels
22.4.4.Nested FOR loop counter
22.4.5.Nested three level LOOP
22.4.6.Reversed FOR LOOP
22.4.7.The upper or lower bounds of the FOR loop can be defined as variables or functions.
22.4.8.Nested IF statement in For loop
22.4.9.Use FOR LOOP to loop through dates
22.4.10.EXIT a FOR LOOP with exit command
22.4.11.FOR Loop Scoping Rules
22.4.12.FOR Loop Ranges
22.4.13.LOOP with Labels
22.4.14.A complete example if uisng the cursor variable using a cursor FOR LOOP
22.4.15.FOR year_number IN 1800..1995: define variable for a range type
22.4.16.Drop any objects to make script re-runnable: for in
22.4.17.For loop variable in a range of numbers
22.4.18.Reversed loop
22.4.19.variable-delimitted loop
22.4.20.EXPLAIN PLAN FOR select statement