MYSQL存储过程-练习2 while 循环

MYSQL存储过程-练习2 while 循环

 1 #WHILE循环
 2 DELIMITER $$
 3
 4 CREATE  PROCEDURE `sp_while`()
 5 BEGIN
 6   DECLARE i INT;
 7   SET i=1;
 8   WHILE i<=5 DO
 9     SELECT i;
10     SET i=i+1;
11   END WHILE;
12 END$$
13
14 DELIMITER ;

执行存储过程

 1 mysql> call sp_while();
 2 +------+
 3 | i    |
 4 +------+
 5 |    1 |
 6 +------+
 7 1 row in set (0.00 sec)
 8
 9 +------+
10 | i    |
11 +------+
12 |    2 |
13 +------+
14 1 row in set (0.01 sec)
15
16 +------+
17 | i    |
18 +------+
19 |    3 |
20 +------+
21 1 row in set (0.02 sec)
22
23 +------+
24 | i    |
25 +------+
26 |    4 |
27 +------+
28 1 row in set (0.03 sec)
29
30 +------+
31 | i    |
32 +------+
33 |    5 |
34 +------+
35 1 row in set (0.04 sec)
36
37 Query OK, 0 rows affected (0.04 sec)