select * from 表A where 查找内容=case COLOR when '红' then ww when '蓝' then DAY end
意思就是这样的select GOODS WHERE COLOR='红' and ww='01', select GOODS WHERE COLOR='蓝' AND DAY='02'.把这两个语句合并在一起,写成一条语句!
select GOODS WHERE (COLOR='红' and ww='01')or(COLOR='蓝' AND DAY='02')
---------------------------------------------------------------- -- Author :DBA_Huangzj(發糞塗牆) -- Date :2014-01-22 15:06:50 -- 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:[huang] if object_id('[huang]') is not null drop table [huang] go create table [huang]([ID] int,[GOODS] varchar(4),[ww] varchar(2),[DAY] varchar(2),[COLOR] varchar(2)) insert [huang] select 1,'外套','01','01','红' union all select 2,'裤子','03','02','蓝' union all select 3,'外套','01','01','绿' union all select 4,'外套','02','01','红' union all select 5,'裤子','10','02','灰' union all select 6,'外套','02','01','红' --------------开始查询--------------------------select [GOODS] from [huang] WHERE (COLOR='红' and ww='01')or(COLOR='蓝' AND DAY='02') ----------------结果---------------------------- /* GOODS ----- 外套 裤子 */
select * from 表A where 查找内容=case COLOR when '红' then ww when '蓝' then DAY end
-- Author :DBA_Huangzj(發糞塗牆)
-- Date :2014-01-22 15:06:50
-- 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:[huang]
if object_id('[huang]') is not null drop table [huang]
go
create table [huang]([ID] int,[GOODS] varchar(4),[ww] varchar(2),[DAY] varchar(2),[COLOR] varchar(2))
insert [huang]
select 1,'外套','01','01','红' union all
select 2,'裤子','03','02','蓝' union all
select 3,'外套','01','01','绿' union all
select 4,'外套','02','01','红' union all
select 5,'裤子','10','02','灰' union all
select 6,'外套','02','01','红'
--------------开始查询--------------------------select [GOODS] from [huang]
WHERE (COLOR='红' and ww='01')or(COLOR='蓝' AND DAY='02')
----------------结果----------------------------
/*
GOODS
-----
外套
裤子
*/