一个奇葩的SQL

需求

建表脚本

CREATE TABLE [dbo].[A](
    [dm] [varchar](5) NOT NULL,
    [dmmc] [varchar](20) NULL
) ON [PRIMARY]

GO
CREATE TABLE [dbo].[B](
    [xh] [varchar](5) NOT NULL,
    [km01] [varchar](25) NULL,
    [km02] [varchar](25) NULL,
    [km03] [varchar](25) NULL
) ON [PRIMARY]

USE [test]
GO
/****** Object:  StoredProcedure [dbo].[sp_pivotA]    Script Date: 2016/4/22 19:07:47 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
 
ALTER PROCEDURE [dbo].[sp_pivotA] 
 
AS
BEGIN 
    SET NOCOUNT ON;
    declare @sql varchar(8000) 
     select @sql=   LEFT(t,LEN(t)-1)
     from
     (
     SELECT  distinct  ( select  '['+dm+'],'   from A FOR XML PATH('') )as t   from A as d  
     )e
     declare @sql2 varchar(8000) 
     set @sql2='SELECT ''学号'' as''xh'',* 

    FROM A
    pivot(MAX(A.dmmc) FOR dm IN('+@sql+') )as P'
 
      exec(@sql2)
END

调用 存储过程

DROP TABLE #tmp1
 go
 select * into #tmp1 from B where 1=2
 insert INTO #tmp1 EXEC [dbo].[sp_pivotA]

 select * from #tmp1
  union all
  select * from B

如果想让km01,...显示成中文名称,也就是列名显示成第一行的那些中文，也可以 把B表先逆透视转换一下  然后去跟A表关联  然后在透视转换回来就可以 了。