text: REM while2.sql
  REM Chapter 3, Oracle9i PL/SQL Programming by Scott Urman
  REM The WHILE loop in this example has a NULL condition.
  
  DECLARE
    v_Counter BINARY_INTEGER;
  BEGIN
    -- This condition will evaluate to NULL, since v_Counter
    -- is initialized to NULL by default.
    WHILE v_Counter <= 50 LOOP
      INSERT INTO temp_table
        VALUES (v_Counter, 'Loop index');
      v_Counter := v_Counter + 1;
    END LOOP;
  END;
  /
  