Conrol Statement (IF, CASE, LOOP, FOR, ...)

http://docs.oracle.com/cd/E11882_01/appdev.112/e25519/controlstatements.htm#LNPLS004

• Conditional selection statements, which run different statements for different data values.

  The conditional selection statements are IF and and CASE.

• Loop statements, which run the same statements with a series of different data values.

  The loop statements are the basic LOOP, FOR LOOP, and WHILE LOOP.

  The EXIT statement transfers control to the end of a loop. The CONTINUE statement exits the current iteration of a loop and transfers control to the next iteration. Both EXIT and CONTINUE have an optional WHEN clause, where you can specify a condition.

• Sequential control statements, which are not crucial to PL/SQL programming.

  The sequential control statements are GOTO, which goes to a specified statement, and NULL, which does nothing.