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mysql触发器和存储过程小测试_MySQL

时间:2021-07-01 10:21:17 帮助过:17人阅读

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mysql触发器和存储过程小测试

1. 为了测试触发器和存储过程,首先建立一张简单的表:

CREATE TABLE `airuser` (

`userId` int(11) NOT NULL AUTO_INCREMENT,

`username` varchar(128) NOT NULL,

PRIMARY KEY (`userId`)

)ENGINE=InnoDB DEFAULT CHARSET=utf8

2. 为该表的插入操作,创建一张记录表:

CREATE TABLE `airuser_record` (

`id` int(11) NOT NULL AUTO_INCREMENT,

`username` varchar(45) DEFAULT NULL,

`edittime` timestamp NULL DEFAULT NULL,

`edittype` varchar(45) DEFAULT NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8

3. 编写一个插入操作的触发器:

DROP TRIGGER insert_trigger;

delimiter |

CREATE TRIGGER insert_trigger BEFORE INSERT ON airuser

FOR EACH ROW BEGIN

INSERT INTO airuser_record SET username = NEW.username, edittime=now(), edittype='insert';

END;

|

SHOW TRIGGERS;

4. 为批量插入编写存储过程:

DROP procedure createUsers;

delimiter |

create procedure createUsers(IN count int)

begin

declare i int;

set i=0;

while i

insert into airuser set username=concat('user_',i);

set i=i+1;

end while;

end;

|

show procedure status;

5. 调用存储过程,验证存储过程是工作的,并验证在插入记录前,触发器能正确被触发:

call createUsers(10);

6. 最后通过插入记录表再次验证:

SELECT * FROM mars_jpa.airuser_record;



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