客户提出需求，针对某一列分组加上小计，合计汇总。网上找了一些有关SQL加合计的语句。都不是很理想。决定自己动手写。

思路有三个：

1.很多用GROUPPING和ROLLUP来实现。

  优点实现代码简洁，要求对GROUPPING和ROLLUP很深的理解。

  缺点：低版本的Sql Server不支持。

2.游标实现。

  优点：思路逻辑简洁。

  缺点：复杂和低效。

3.利用临时表。

  优点：思路逻辑简洁，执行效率高。SQL实现简单。

  缺点：数据量大时耗用内存.

综合三种情况，决定“利用临时表”实现。

实现效果

原始表TB

加上小计，合计后效果

SQL语句

 select * into #TB from TB

select * into #TB1 from #TB where 1<>1

select distinct zcxt into #TBype from #TB order by zcxt

select identity(int,1,1)  fid,zcxt into #TBype1 from #TBype

DECLARE @i int

DECLARE @k int

 

 select @i=COUNT(*) from #TBype

 set @k=0

  DECLARE @strfname varchar(50)

 WHILE @k < @i

  BEGIN

   Set @k +1

   select @strfname=zcxt from #TBype1 where fid

   set IDENTITY_INSERT #TB1 ON

      insert into #TB1(fid,qldid,fa_cardid,ztbz,fa_name,model,i_number,gzrq,zcyz,ljzj,jz,sybm,zcxt,fa_ljjzzb)

       select fid,qldid,fa_cardid,ztbz,fa_name,model,i_number,gzrq,zcyz,ljzj,jz,sybm,zcxt,fa_ljjzzb from

      (

   select * from #TB where

   union all

         select 0 fid,'' qldid,'' fa_cardid,'' ztbz,'小计' fa_name,'' model,sum(i_number) as i_number,'' gzrq,sum(CAST(zcyz as money)) as zcyz,sum(CAST(ljzj as money)) as ljzj,sum(CAST(jz as money)) as jz,'' sybm,'' zcxt,Sum(fa_ljjzzb) as fa_ljjzzb

   from #TB where

   group by ztbz

  ) as B

 set IDENTITY_INSERT #TB1 off

  END

select qldid,fa_cardid,zcxt,fa_name,model,i_number,gzrq,zcyz,ljzj,jz,sybm,ztbz,fa_ljjzzb from #TB1

union all

select '' qldid,'' fa_cardid,'' ztbz,'合计' fa_name,'' model,sum(i_number) as i_number,'' gzrq,sum(CAST(zcyz as money)) as zcyz,sum(CAST(ljzj as money)) as ljzj,sum(CAST(jz as money)) as jz,'' sybm,'' zcxt,Sum(fa_ljjzzb) as fa_ljjzzb

from #TB

drop table #TB1

drop table #TBype1

drop table #TBype

drop table #TB

扩展改进

可以改写成一个通用的添加合计小计的存储过程。