mysql存储过程 函数 触发器_MySQL 存储过程、函数、触发器

1.触发器

mysql> delimiter |

mysql> create trigger beforeinsertuserinfo

-> before insert on userinfo

-> for each row begin

-> insert into userinfolog values(now(),CONCAT(new.userid,new.username));

-> end;

-> |

mysql> delimiter ;

mysql> show triggers;

2.存储过程

mysql> delimiter //

mysql> create procedure spinsertuserinfo(

-> puserid int,pusername varchar(10)

-> ,puserbirthday date

-> )

-> begin

-> insert into userinfo values(puserid,pusername,puserbirthday);

-> end;

-> //

mysql> show procedure status like 'spinsertuserinfo';

mysql> call spinsertuserinfo(1,'zhangsan',current_date);

mysql> select * from userinfo;

3.自定义函数

mysql> update userinfo

-> set userbirthday='2000.01.01'

-> where userid='1';

mysql> drop function if exists fngetage;

mysql> delimiter //

mysql> create function fngetage(pbirthday date)

-> returns integer

-> begin

-> return year(now()) - year(pbirthday);

-> end

-> //

4.视图

mysql> create view viewuserinfo

-> as select * ,fngetage(userbirthday) as userage from userinfo;

mysql> select * from viewuserinfo;

清除日志记录

mysql> truncate table userinfolog;

mysql> delete from userinfolog;

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2009-09-15 15:24

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