JOIN 样本 **********************************
Update 结存 set 结存.现有库存=c.入仓数-b.出仓数量 from 结存 a join (select 物料代码,sum(isnull(入仓数,0)) 入仓数 from 进仓 group by 物料代码) c on a.代码=c.物料代码 left join (select 代码,sum(isnull(出仓数量,0)) 出仓数量 from 领料 group by 代码) b on a.代码=b.代码
1. 方法 (Join 方式 Update ) 推荐 ...
Update hekTapMain SET dtCount=TapDetail.cnt_tdID FROM hekTapMain TapMain join (SELECT htMainID, Count(tdID) as cnt_tdID FROM hekTapDetail Group by htMainID) TapDetail on TapMain.htID=TapDetail.htMainID WHERE TapMain.htID=58
2. 方法 (Where 方式)
Update hekTapMain SET dtCount=TapDetail.cnt_tdID FROM (SELECT Count(tdID) as cnt_tdID FROM hekTapDetail WHERE htMainID=58) as TapDetail WHERE hekTapMain.htID=58