动态列名数据视图实现

测试环境:

select @@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 (Build 7601: Service Pack 1) */

--以下实现如果任何列的值全部为4时，不显示该列。

use master go sp_configure 'show advanced options', 1; GO RECONFIGURE;

GO sp_configure 'Ad Hoc Distributed Queries', 1; --开启OpenRowset/OpenDatasource的访问 GO RECONFIGURE; GO --测试 use Tempdb go --> --> set nocount on; if not object_id(N'T','U') is null drop table T Go create table t(F1 int,F2 int,F3 int,F4 int,F5 int,F6 int,F7 int,F8 int,F9 int) insert into t select 4,3,2,4,2,3,4,2,6 insert into t select 4,1,3,4,2,4,2,3,5 insert into t select 4,1,3,4,2,6,3,4,5 insert into t select 4,2,1,4,3,2,4,1,3 Go if OBJECT_ID('p1','P') is not null drop proc p1 go CREATE PROCEDURE p1 as set nocount on; declare @s nvarchar(4000) select @s=isnull(@s+',','')+quotename(Name) from syscolumns where ID=object_id('T') and Name not in('Student') order by Colid exec('declare @s nvarchar(4000),@i int set @i=1 ;with b as ( Select * from (select *, ROW_NUMBER()over( order by (select 1)) as row from T) as a UNPIVOT (VALUE FOR Cols IN('+@s+'))AS b ) select @s=isnull(@s+'','','' select '')+quotename(Cols)+'' as T''+rtrim(@i), @i=@i+1 from b where not exists(select 1 from b as c where c.Cols=b.Cols and VALUE=4 having COUNT(c.row)=(select MAX(row) from b)) group by Cols exec(@s+'' from T'') ') go if OBJECT_ID('v_p1','v') is not null drop VIEW v_p1 go CREATE VIEW v_p1 AS SELECT * FROM OPENROWSET( 'sqloledb', 'Trusted_Connection=yes', --验证方式这里用信任连接，可用SQL Server认证的方式来代替 'SET FMTONLY OFF; --只将元数据返回给客户端。可以用于测试响应的格式，而不必实际执行查询。 EXEC tempdb..p1 ' ) go select * from v_p1 /* T1 T2 T3 T4 T5 T6 T7 3 2 2 3 4 2 6 1 3 2 4 2 3 5 1 3 2 6 3 4 5 2 1 3 2 4 1 3 */
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