触发器实现两表之间的INSERT,DELETE,UPDATE

需求说明：培训记录处录入"外出培训"记录，保存后同步外出培训合同至"合同模块"

培训记录表PX_Record创建触发器

步骤一、新建触发器：[insert_htandAL]

步骤二、当PeiXun_Record表有INSERT,DELETE,UPDATE操作，则在触发器中执行INSERT,DELETE,UPDATE 操作将相关改变同步至合同表Emp_HT,必须用PX_Record表中Pxr_ID字段做唯一标识过滤

执行代码如下：

USE [XXXXX]

GO

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

ALTER TRIGGER [dbo].[insert_htandAL]

ON [dbo].[PX_Record]

for INSERT,DELETE,UPDATE

AS

BEGIN

--01新增操作

if(exists(select 1 from inserted) and not exists(select 1 from deleted))

insert into Emp_HT (Comp_Code,Ht_code,Ht_empid,Ht_class,Ht_StartDate,Ht_EndDate,Ht_OldID,Ht_Num,Ht_Status,Ht_IsZhiXing,Ht_ContinueDesc,Ht_StopDesc

,Ht_EndDesc,Ht_desc,Ht_memo,createby,createtime,updateby,updatetime,Ht_Company,Ht_Year,G_htzdr,Ht_DocPath,Ht_Template,Ht_TemplatePath,G_pxid)

select a.Comp_Code,Emp_code,Pxr_empid,'02',G_sxDate,G_shxDate,null,1,0,1,null,null

,null,null,Pxr_memo,a.createby,a.createtime,a.updateby,a.updatetime,null,G_qdnx,null,null,null,null,Pxr_ID

from inserted a

inner join Emp_Base b on a.Pxr_empid=b.Emp_id

where isnull(pxr_class,0)=1 and G_ifpxxy='是'

END

--02删除操作

if(not exists(select 1 from inserted) and exists(select 1 from deleted))

begin

delete from Emp_HT

where G_pxid in(select Pxr_ID from deleted)

end

--03更新操作

if(exists(select 1 from inserted) and exists(select 1 from deleted))

begin

update Emp_HT set

Ht_StartDate=a.G_sxDate ,

Ht_EndDate=a.G_shxDate,

Ht_Year=a.G_qdnx,

updateby=a.updateby,

updatetime=a.updatetime

from inserted a

where G_pxid=a.Pxr_ID and isnull(a.pxr_class,0)=1 and a.G_ifpxxy='是'

end

备注说明：

触发器简介：

触发器是一种特殊的存储过程，它的执行不是由程序调用，也不是手动执行，而是由事件来触发。触发器是当对某一个表进行操作。例如：update、insert、delete这些操作的时候，系统会自动调用执行该表上对应的触发器。

-- 查询已存在的触发器
select * from sys.triggers;
select * from sys.objects where type = 'TR';
select * from sysobjects where xtype='TR'

-- 查看触发器触发事件对象
select a.type_desc,b.* from sys.trigger_events a
inner join sys.triggers b on a.object_id = b.object_id
where b.name = 'insert_hetongandAskLeave';

-- 查询触发器的 T-SQL 文本
exec sp_helptext 'insert_hetongandAskLeave';


--禁用触发器
disable trigger trigger_Stu_InsteadOf on Student; -- trigger_Stu_InsteadOf 触发器名称
--启用触发器
enable trigger trigger_Stu_InsteadOf on Student; -- trigger_Stu_InsteadOf 触发器名称