新学SQLSERVER请教如何分列
本帖最后由 oXueYuZhiYing 于 2012-11-24 11:53:47 编辑 在表A中和“料号”列
SELECT 料号 FROM A
//----
料号
A001,102,499
A003,1023,39
A001-A,2.2,32
我想把料号这一列分成三列，中间用','做间隔
用SELECT 查询时表变成
品名 长度 宽度 面积
A001 102 499 102*499
A003 1023 39 1023*39
A001-A 2.2 32 2.3* 32
-----
请教各位要如何操作才能达到这个效果？
网上的例子很多，但是太复杂，实在看不懂
[最优解释]
--创建数据开始
if(object_id('a') is not null) drop table a
go
create table a
(
material varchar(4),
length decimal(5,1),
width decimal(5,1)
)
go
insert into a
select 'A001',102,499 union all
select 'A003',1023,39 union all
select 'A001-A',2.2,32
go
--创建数据结束
--语句
select material as '品名',length as'长度',width as '宽度'
,cast(length as varchar)+'*'+cast(width as varchar) as '面积'
,width*length as '面积值'
from a
--结果展示
/*
品名 长度 宽度 面积 面积值
---- --------------------------------------- --------------------------------------- ------------------------- ---------------------------------------
A001 102.0 499.0 102.0*499.0 50898.00
A003 1023.0 39.0 1023.0*39.0 39897.00
A001 2.2 32.0 2.2*32.0 70.40
(3 行受影响)
*/
----------------------------
-- Author :TravyLee(物是人非事事休，欲语泪先流！)
-- Date :2012-11-24 12:45:57
-- Version:
-- Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86)
--Jul 9 2008 14:43:34
--Copyright (c) 1988-2008 Microsoft Corporation
--Developer Edition on Windows NT 6.1 <X86> (Build 7600: )
--
----------------------------
--> 测试数据：[test]
if object_id('[test]') is not null
drop table [test]
go
create table [test]
(
[物料] varchar(13)
)
insert [test]
select 'A001,102,499' union all
select 'A003,1023,39' union all
select 'A001-A,2.2,32'
go
;with t
as(
select
LEFT([物料],CHARINDEX(',',[物料])-1) as 品名,
cast(SUBSTRING([物料],CHARINDEX(',',[物料])+1,CHARINDEX(',',[物料],CHARINDEX(',',[物料])+1)-CHARINDEX(',',[物料])-1) as numeric(8,2))as 长度,
cast(RIGHT([物料],CHARINDEX(',',REVERSE([物料]))-1) as numeric(8,2)) as 宽度
from
test
)
select
品名,
长度,
宽度,
长度*宽度 as 面积
from
t
/*
品名长度宽度面积
-------------------------------------------------------
A001102.00499.0050898.0000
A0031023.0039.0039897.0000
A001-A2.2032.0070.4000
*/
