《Mysql必讀用SQL實現(xiàn)統(tǒng)計報表中的"小計"與"合計"的方法詳解》要點:
本文介紹了Mysql必讀用SQL實現(xiàn)統(tǒng)計報表中的"小計"與"合計"的方法詳解,希望對您有用。如果有疑問,可以聯(lián)系我們。
MYSQL數(shù)據(jù)庫客戶提出需求,針對某一列分組加上小計,合計匯總.網(wǎng)上找了一些有關(guān)SQL加合計的語句.都不是很抱負(fù).決定自己動手寫.
思路有三個:
1.很多用GROUPPING和ROLLUP來實現(xiàn).
? 優(yōu)點:實現(xiàn)代碼簡潔,要求對GROUPPING和ROLLUP很深的理解.
? 缺點:低版本的Sql Server不支持.
2.游標(biāo)實現(xiàn).
? 優(yōu)點:思路邏輯簡潔.
? 缺點:復(fù)雜和低效.
3.利用臨時表.
? 優(yōu)點:思路邏輯簡潔,執(zhí)行效率高.SQL實現(xiàn)簡單.
? 缺點:數(shù)據(jù)量大時耗用內(nèi)存.
MYSQL數(shù)據(jù)庫綜合三種情況,決定“利用臨時表”實現(xiàn).
實現(xiàn)效果
原始表TB
MYSQL數(shù)據(jù)庫
MYSQL數(shù)據(jù)庫加上小計,合計后效果
MYSQL數(shù)據(jù)庫
MYSQL數(shù)據(jù)庫SQL語句
代碼如下:
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 =@k +1
?? select @strfname=zcxt from #TBype1 where fid =@k
?? 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 zcxt=@strfname
?? union all
???????? select 0 fid,'' qldid,'' fa_cardid,'' ztbz,'小計' 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 zcxt=@strfname
?? 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,'合計' 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
擴(kuò)展改良
可以改寫成一個通用的添加合計小計的存儲過程.
維易PHP培訓(xùn)學(xué)院每天發(fā)布《Mysql必讀用SQL實現(xiàn)統(tǒng)計報表中的"小計"與"合計"的方法詳解》等實戰(zhàn)技能,PHP、MYSQL、LINUX、APP、JS,CSS全面培養(yǎng)人才。
轉(zhuǎn)載請注明本頁網(wǎng)址:
http://www.fzlkiss.com/jiaocheng/13905.html