假设现在有这样一张表:
CREATE TABLE [dbo].[relConList] (
[listID] [smallint] IDENTITY (1, 1) NOT NULL ,
[listFKMainID] [varchar] (20) COLLATE Chinese_PRC_CI_AS NOT NULL ,
[listFKRelID] [varchar] (20) COLLATE Chinese_PRC_CI_AS NOT NULL
) ON [PRIMARY]
GO
如果要实现行列转换,则我必须要建立函数,函数如下:
CREATE FUNCTION MergeRelID (@listFKMainID varchar(20))
RETURNS varchar(2000)
AS
BEGIN
DECLARE @listFKRelID varchar(2000)
SET @listFKRelID=''
SELECT @listFKRelID = @listFKRelID +','+ listFKRelID FROM RelConList WHERE listFKMainID=@listFKMainID
RETURN(substring(@listFKRelID,2,2000))
END
在使用时,使用如下语句,就可以显示转换了!!
select dbo.MergeRelID(listFKMainID)
from RelConList
group by listFKMainID