数据库触发器基本知识

来源：未知责任编辑：责任编辑发表时间:2015-01-01 13:18　点击:次

数据库触发器基本知识

触发器是自动的：它们在对表的数据作了任何修改（比如手工输入或者应用程序采取的操作）之后立即被激活。

Java代码

if exists(select * from sysobjects where name = 'Tbl_periodPara_Update_Trigger' )

drop TRIGGER Tbl_periodPara_Update_Trigger

create TRIGGER Tbl_periodPara_Update_Trigger

on tbl_periodPara

for update

as RAISERROR ('Job id 1 expects the default level of 10.', 16, 1)

GO www.2cto.com

update tbl_periodPara set iPeriod = 4 where strName = 'SysSamplePara'

sp_helptrigger 'tbl_periodPara','update'

select * from sysobjects where name = 'Tbl_periodPara_Update_Trigger'