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。