EXPLAIN PLAN FOR select statement : For LOOP « PL SQL Statements « Oracle PL/SQL Tutorial

SQL>
SQL> CREATE TABLE employee
  2  (employee_id         NUMBER(7),
  3   last_name           VARCHAR2(25),
  4   first_name          VARCHAR2(25),
  5   userid              VARCHAR2(8),
  6   start_date          DATE,
  7   comments            VARCHAR2(255),
  8   manager_id          NUMBER(7),
  9   title               VARCHAR2(25),
 10   department_id       NUMBER(7),
 11   salary              NUMBER(11, 2),
 12   commission_pct      NUMBER(4, 2)
 13  );

Table created.

SQL>
SQL> INSERT INTO employee VALUES (1, 'V', 'Ben', 'cv',to_date('03-MAR-90 8:30', 'dd-mon-yy hh24:mi'),NULL, NULL, 'PRESIDENT', 50, 2500, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (2, 'N', 'Haidy', 'ln', '08-MAR-90', NULL,1, 'VP, OPERATIONS', 41, 1450, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (3, 'N', 'Molly', 'mn', '17-JUN-91',NULL, 1, 'VP, SALES', 31, 1400, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (4, 'S', 'Mark', 'mq', '07-APR-90',NULL, 1, 'VP, FINANCE', 10, 1450, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (5, 'R', 'AUDRY', 'ar', '04-MAR-90',NULL, 1, 'VP, ADMINISTRATION', 50, 1550, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (6, 'U', 'MOLLY', 'mu', '18-JAN-91',NULL, 2, 'WAREHOUSE MANAGER', 41, 1200, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (7, 'M', 'ROBERTA', 'rm', '14-MAY-90',NULL, 2, 'WAREHOUSE MANAGER', 41, 1250, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (8, 'B', 'BEN', 'ry', '07-APR-90', NULL, 2,'WAREHOUSE MANAGER', 41, 1100, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (9, 'C', 'Jane', 'ac', '09-FEB-92',NULL, 2, 'WAREHOUSE MANAGER', 41, 1300, NULL);

1 row created.

SQL> INSERT INTO employee VALUES (10, 'H', 'Mart', 'mh', '27-FEB-91', NULL, 2,'WAREHOUSE MANAGER', 41, 1307, NULL);

1 row created.

SQL>
SQL>
SQL>
SQL> EXPLAIN PLAN FOR
  2  SELECT last_name, first_name
  3  FROM   employee;

Explained.

SQL>
SQL>
SQL> drop table employee;

Table dropped.

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