SQL Server2012关于表内事项出现次数降序排列（存储过程）

 USE [growup]
 GO
 SET ANSI_NULLS ON
 GO
 SET QUOTED_IDENTIFIER ON
 GO

 ALTER PROCEDURE  [dbo].[S_GetRankingList]
 @timestart datetime,
 @timeend datetime
 AS
 BEGIN

     SET NOCOUNT ON;

     select *
     from(
     SELECT
      count(1) as t,
      S_BigClass as bc,
      S_SmallClass as sc,
      S_MatterName as mn from S_Matter
      where
      @timestart<=S_PlanStart
      and @timeend>=S_PlanStart
      group by S_BigClass,S_SmallClass,S_MatterName
      )as c
      order by t desc
 END