A table
AutoId Group Name InnNo
1 A N1 1
2 A N2 1
22 A N3 1
B table
AutoId Group Name InnNo
1 A N1 1
2 A N2 2
22 A N3 3
要求删除A表中的记录，要求：如果A table 中 Name = B 表中 Name 且 A table 中 InnNo= B 表中 InnNo
delete from A where ??????
------解决方案--------------------
----------------------------------------------------------------
-- Author :DBA_HuangZJ(發糞塗牆)
-- Date :2014-08-26 12:41:03
-- Version:
-- Microsoft SQL Server 2012 - 11.0.5058.0 (X64)
-- May 14 2014 18:34:29
-- Copyright (c) Microsoft Corporation
-- Enterprise Edition: Core-based Licensing (64-bit) on Windows NT 6.3 <X64> (Build 9600: ) (Hypervisor)
--
----------------------------------------------------------------
--> 测试数据：[A]
if object_id('[A]') is not null drop table [A]
go
create table [A]([AutoId] int,[Group] varchar(1),[Name] varchar(2),[InnNo] int)
insert [A]
select 1,'A','N1',1 union all
select 2,'A','N2',1 union all
select 22,'A','N3',1
--> 测试数据：[B]
if object_id('[B]') is not null drop table [B]
go
create table [B]([AutoId] int,[Group] varchar(1),[Name] varchar(2),[InnNo] int)
insert [B]
select 1,'A','N1',1 union all
select 2,'A','N2',2 union all
select 22,'A','N3',3
--------------开始查询--------------------------
select * from [A]
DELETE A FROM a INNER JOIN b ON a.Name =b.Name AND a.innno=b.innno
SELECT * FROM a
----------------结果----------------------------
/*
AutoId Group Name InnNo
----------- ----- ---- -----------
1 A N1 1
2 A N2 1
22 A N3 1
(3 行受影响)
(1 行受影响)
AutoId Group Name InnNo
----------- ----- ---- -----------
2 A N2 1
22 A N3 1
*/
------解决方案--------------------
嘿嘿，我有个笨方法，楼主应该比较好理解：查找InnNo，删除符合的数据
DELETE FROM A WHERE InnNo IN