Inserted和Deleted在insert、update、delete的简单使用

Inserted和Deleted在insert、update、delete的简单使用

Inserted表和Deleted表,仅仅在触发器运行时存在。当insert、update、delete操作时，可使用借助两个表来输出（使用OUTPUT关键字）操作前后的数据的变化。

一、insert语句

1) Inserted表:存放着插入后该行的数据
2) Deleted表状态为不可用

SELECT TOP 1000 [Id]
      ,[name]
      ,[email]
  FROM [HLLDb].[dbo].[Table_1]

--truncate table [HLLDb].[dbo].[Table_1]

insert into [HLLDb].[dbo].[Table_1] (name,email) 
OUTPUT Inserted.name ,Inserted.email 
values ('a','a@xxx.com')

insert into [HLLDb].[dbo].[Table_1] (name,email) 
OUTPUT Inserted.name,Inserted.email 
values ('b','b@xxx.com')

二、update语句

1) Inserted表:存放着更新后该行的数据（新数据）
2) Deleted表:存放着更新前该行的数据（旧数据）

SELECT TOP 1000 [Id]
      ,[name]
      ,[email]
  FROM [HLLDb].[dbo].[Table_1]


update [HLLDb].[dbo].[Table_1] set name = 'c', email = 'c@xxx.com'
OUTPUT Deleted.name as oldname ,Deleted.email as oldemail
,Inserted.name as [newname],Inserted.email as newemail
where name = 'a'


update [HLLDb].[dbo].[Table_1] set name = 'd', email = 'd@xxx.com'
OUTPUT Deleted.name as oldname ,Deleted.email as oldemail
,Inserted.name as [newname],Inserted.email as newemail
where name = 'b'

三、delete语句

1) Inserted表状态为不可用
2) Deleted表:存放着删除前该行的数据

SELECT TOP 1000 [Id]
      ,[name]
      ,[email]
  FROM [HLLDb].[dbo].[Table_1]


delete [HLLDb].[dbo].[Table_1] 
OUTPUT Deleted.name as oldname ,Deleted.email as oldemail
where name in('c', 'd')



SELECT TOP 1000 [Id]
      ,[name]
      ,[email]
  FROM [HLLDb].[dbo].[Table_1]

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