drop procedure if exists batch_insert_user; delimiter // create procedure batch_insert_user() begin declare i int default 0; start transaction; set i = 1; while i < 1000 do insert into users(username, password) values(concat("krkj", i), concat("krkjp", i)); set i = i + 1; end while; end; // call batch_insert_user(); select * from users; select @val:=concat("dog", 10);
drop procedure if exists batch_insert_user; delimiter // create procedure batch_insert_user() begin declare i int default 0; start transaction; repeat insert into users(username, password) values(concat("repeat", i), concat("repeata", i)); set i = i + 1; until i >1000 end repeat; end; // call batch_insert_user(); SET SQL_SAFE_UPDATES = 0; delete from users; select * from users;
drop procedure if exists batch_insert_user; delimiter // create procedure batch_insert_user() begin declare i int default 0; start transaction; loop_label:loop insert into users(username, password) values(concat("loop", i), concat("loopp", i)); set i = i + 1; if i >= 1000 then leave loop_label; end if; end loop; end; //
存储过程P_GET_CLASS_NAME是根据输入的班级号判断班级名称 存储过程P_INSERT_STUDENT是接收输入的学生信息,最终将信息插入学生表。 DROP PROCEDURE IF EXISTS `P_GET_CLASS_NAME`; CREATE PROCEDURE P_GET_CLASS_NAME(IN ID int,OUT NAME VARCHAR(50)) BEGIN IF(ID = 1) THEN SET NAME = '一班'; END IF; IF(ID = 2) THEN SET NAME = '二班'; END IF; END; DROP PROCEDURE IF EXISTS `P_INSERT_STUDENT`; CREATE PROCEDURE P_INSERT_STUDENT(IN ID INT,IN NAME VARCHAR(10),IN CLASSNO INT,IN BIRTH DATETIME) BEGIN SET @ID = ID; SET @NAME = NAME; SET @CLASSNO = CLASSNO; SET @BIRTH = BIRTH; SET @CLASSNAME = NULL; CALL P_GET_CLASS_NAME(@CLASSNO,@CLASSNAME); SET @insertSql = CONCAT('INSERT INTO TBL_STUDENT VALUES(?,?,?,?)'); PREPARE stmtinsert FROM @insertSql; EXECUTE stmtinsert USING @ID,@NAME,@CLASSNAME,@BIRTH; DEALLOCATE PREPARE stmtinsert; END; CALL P_INSERT_STUDENT(1,'xy',1,'2012-10-01 10:20:01'); 在第二个存储过程中 ①利用SET声明了参数,调用了第一个存储过程 ②在第一个存储过程中的NAME参数是输出参数,所以@CLASSNAME这个参数在调用完第一个过程后就被附值 ③最终利用CONCAT拼接SQL语句并传入参数执行SQL语句 CALL P_INSERT_STUDENT(1,'xy',1,'2012-10-01 10:20:01');调用存储过程