TSQL--关联更新和删除

--===================================================

--测试CODE

USE tempdb;

GO

DROP TABLE TB1

GO

DROP TABLE TB2

GO

SELECT TOP(10)

ROW_NUMBER()OVER(ORDER BY object_id) AS RID,

object_id AS ObjectID

INTO TB1

FROM sys.all_objects

GO

SELECT TOP(10)

ROW_NUMBER()OVER(ORDER BY object_id DESC) AS RID,

object_id AS ObjectID

INTO TB2

FROM sys.all_objects

--===================================================

--更新前查看数据

SELECT * FROM TB1

SELECT * FROM TB2

GO

--===================================================

--关联更新数据 5 条数据

UPDATE TOP(5) TB1

SET ObjectID=T2.ObjectID

FROM TB1 AS T1 INNER JOIN TB2 AS T2

ON T1.RID=T2.RID

--===================================================

--更新后查看数据

SELECT * FROM TB1

SELECT * FROM TB2

--===================================================

--关联删除数据 5 条数据

DELETE TOP(5) TB1

FROM  TB1 AS T1

INNER JOIN TB2 AS T2

ON T1.RID=T2.RID

WHERE T1.ObjectID<>T2.ObjectID

--===================================================

--删除后查看数据

SELECT * FROM TB1

SELECT * FROM TB2