PL/SQL User's Guide and Reference

Understanding the Main Features of PL/SQL
the sequence of statements is executed, then control resumes at the top of the loop.
If the condition is false or null, the loop is bypassed and control passes to the next
statement.
In the following example, you find the first employee who has a salary over $2500
and is higher in the chain of command than employee 7499:
-- available online in file ’examp3’
DECLARE
salary emp.sal%TYPE := 0;
mgr_num emp.mgr%TYPE;
last_name emp.ename%TYPE;
starting_empno emp.empno%TYPE := 7499;
BEGIN
SELECT mgr INTO mgr_num FROM emp
WHERE empno = starting_empno;
WHILE salary 25000; -- exit loop if condition is true
END LOOP;
-- control resumes here
Sequential Control
The GOTO statement lets you branch to a label unconditionally. The label, an
undeclared identifier enclosed by double angle brackets, must precede an
Overview of PL/SQL 1-11