日期:2014-05-17 浏览次数:20441 次
----------------------------------------------------------------
-- Author :DBA_Huangzj(發糞塗牆)
-- Date :2013-11-27 16:52:12
-- Version:
-- Microsoft SQL Server 2012 (SP1) - 11.0.3128.0 (X64)
-- Dec 28 2012 20:23:12
-- Copyright (c) Microsoft Corporation
-- Enterprise Edition (64-bit) on Windows NT 6.2 <X64> (Build 9200: )
--
----------------------------------------------------------------
--> 测试数据:[A]
if object_id('[A]') is not null drop table [A]
go
create table [A]([UnitID] int,[Remark] sql_variant)
insert [A]
select 1,null union all
select 2,null union all
select 3,null
--> 测试数据:[B]
if object_id('[B]') is not null drop table [B]
go
create table [B]([UnitID] int,[Remark] varchar(1))
insert [B]
select 1,'a' union all
select 2,'b' union all
select 3,'c'
--------------开始查询--------------------------
select * from [A]
update a
set a.remark=b.remark
from a inner join b on a.unitID=b.unitID
select * from [A]
----------------结果----------------------------
/*
UnitID Remark
----------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------