MySQL 的 LEAVE 语句退出循环
时间:2016-05-26 13:53 来源:linux.it.net.cn 作者:IT
mysql>
mysql> delimiter $$
mysql>
mysql> CREATE PROCEDURE myProc()
-> BEGIN
-> DECLARE i,j INT DEFAULT 1;
-> outer_loop: LOOP
-> SET j=1;
-> inner_loop: LOOP
-> SELECT CONCAT(i,"times", j,"is",i*j);
-> SET j=j+1;
-> IF j>12 THEN
-> LEAVE inner_loop;
-> END IF;
-> END LOOP inner_loop;
-> SET i=i+1;
-> IF i>12 THEN
-> LEAVE outer_loop;
-> END IF;
-> END LOOP outer_loop;
->
->
->
-> END$$
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql> delimiter ;
mysql> call myProc();
(责任编辑:IT)
mysql> mysql> delimiter $$ mysql> mysql> CREATE PROCEDURE myProc() -> BEGIN -> DECLARE i,j INT DEFAULT 1; -> outer_loop: LOOP -> SET j=1; -> inner_loop: LOOP -> SELECT CONCAT(i,"times", j,"is",i*j); -> SET j=j+1; -> IF j>12 THEN -> LEAVE inner_loop; -> END IF; -> END LOOP inner_loop; -> SET i=i+1; -> IF i>12 THEN -> LEAVE outer_loop; -> END IF; -> END LOOP outer_loop; -> -> -> -> END$$ Query OK, 0 rows affected (0.00 sec) mysql> mysql> delimiter ; mysql> call myProc(); (责任编辑:IT) |