Slide 13.6: Control flow in PL/SQL (cont.)

Slide 13.5: Control flow in PL/SQL
Slide 13.7: Cursors
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Control Flow in PL/SQL (Cont.)

At least one of the statements in <loop_body> should be an EXIT statement of the form

   EXIT WHEN <condition>;

The LOOP breaks if <condition> is true. For example, one way to insert each of the pairs (1, 1) through (10, 10) into T1 of the above two examples is

DECLARE
  i  NUMBER := 1;
BEGIN
  LOOP
    INSERT INTO  T1  VALUES(i, i);
    i := i + 1;
    EXIT WHEN  i > 10;
  END LOOP;
END;
/

Some other useful loop-forming statements are:

EXIT by itself is an unconditional loop break. Use it inside a conditional if you like.
A WHILE loop can be formed with

    WHILE <condition> LOOP
      <loop_body>
    END LOOP;

A simple FOR loop can be formed with:

    FOR <var> IN <start>..<finish> LOOP
      <loop_body>
    END LOOP;

<var>

<start>

<finish>

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“It is not that I’m so smart. But I stay with the questions much longer.”
― Albert Einstein