sql server多行数据拼接的实例方法
编程学习 2021-07-05 13:42www.dzhlxh.cn编程入门
sql server多行数据拼接的实例方法，需要的朋友可以参考一下
1.表结构
id type productCode
1 铅笔 0001
2 铅笔 0002
3 铅笔 0003
4 钢笔 0004
5 钢笔 0005
6 钢笔 0004
7 圆珠笔 0007
8 圆珠笔 0008
9 圆珠笔 0007
2.自定义函数fun
GO
/****** Object: UserDefinedFunction [dbo].[fun] Script Date: 11/22/2011 16:09:45 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
Create function [dbo].[fun](@type nvarchar(10))
returns nvarchar(200)
as
begin
declare @re nvarchar(200)
declare @code nvarchar(200)
set @re=''
set @code=''
select @re=@re+productCode+',' from T where type=@type group by productCode
select @re=left(@re, len(@re)-1)
return @re
end
3.查询语句
select type,dbo.fun(type) from (select distinct type from T) A
结果:
钢笔 0004,0005
铅笔 0001,0002,0003
圆珠笔 0007,0008
id type productCode
1 铅笔 0001
2 铅笔 0002
3 铅笔 0003
4 钢笔 0004
5 钢笔 0005
6 钢笔 0004
7 圆珠笔 0007
8 圆珠笔 0008
9 圆珠笔 0007
2.自定义函数fun
代码如下:
GO
/****** Object: UserDefinedFunction [dbo].[fun] Script Date: 11/22/2011 16:09:45 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
Create function [dbo].[fun](@type nvarchar(10))
returns nvarchar(200)
as
begin
declare @re nvarchar(200)
declare @code nvarchar(200)
set @re=''
set @code=''
select @re=@re+productCode+',' from T where type=@type group by productCode
select @re=left(@re, len(@re)-1)
return @re
end
3.查询语句
select type,dbo.fun(type) from (select distinct type from T) A
结果:
钢笔 0004,0005
铅笔 0001,0002,0003
圆珠笔 0007,0008