SQL语句多表left join SUM出现的重复数据问题！

Posted 2023-03-24

A表生产批号唯一

我做出来left join 结果领料数量会多出来 因为A对BCD表都是一对多的关系 C表与D表是多对多的关系

参考技术A select a.*,bb.领料数量,dd.完工数量
from a
left join (select 生产批号,sum(领料数量) as 领料数量 from b group by 生产批号) bb
on a.生产批号=b.生产批号
left join (select cc.生产批号,sum(d.完工数量) as 完工数量
from (select distinct 生产批号,rcid from c) cc,d
where c.rcid=d.rcid
group by c.生产批号
) dd on a.生产批号=dd.生产批号
;追问

消息 4104，级别 16，状态 1，第 1 行
无法绑定由多个部分组成的标识符 "b.生产批号"。
消息 4104，级别 16，状态 1，第 1 行
无法绑定由多个部分组成的标识符 "c.RCID"。
消息 4104，级别 16，状态 1，第 1 行
无法绑定由多个部分组成的标识符 "c.生产批号"。

追答

select a.*,bb.领料数量,dd.完工数量
from a
left join (select 生产批号,sum(领料数量) as 领料数量 from b group by 生产批号) bb
on a.生产批号=bb.生产批号
left join (select cc.生产批号,sum(d.完工数量) as 完工数量
from (select distinct 生产批号,rcid from c) cc,d
where c.rcid=d.rcid
group by c.生产批号
) dd on a.生产批号=dd.生产批号

本回答被提问者采纳

SQL-left join 左表数据多次出现，求解！

SELECT ph.PronoteHeaderId AS JGDN,ph.InvoiceCusId AS KHDH,pro.ProductName AS HPMC,ph.InvoiceXODetailQuantity AS DDSL,ph.DetailsSum AS SCSL,
(SELECT TOP 1 InvoiceXO.InvoiceYjrq FROM InvoiceXO WHERE InvoiceXO.InvoiceId = ph.InvoiceXOId) AS KHJQ,
CASE WHEN wh.Workhousename LIKE '%射出%' THEN ppd.PronoteProceduresDate END AS SCJQ,
CASE WHEN wh.Workhousename LIKE '%射出%' THEN isnull(pdd.HeJiProceduresSum,0) ELSE '' END AS SCHJSCSL,
CASE WHEN wh.Workhousename LIKE '%射出%' THEN isnull(pdd.HeJiCheckOutSum,0) ELSE '' END AS SCHJHGSL,
CASE WHEN wh.Workhousename LIKE '%品管%' THEN ppd.PronoteProceduresDate END AS PGJQ,
CASE WHEN wh.Workhousename LIKE '%品管%' THEN isnull(pdd.HeJiProceduresSum,0) ELSE '' END AS PGHJSCSL,
CASE WHEN wh.Workhousename LIKE '%品管%' THEN isnull(pdd.HeJiCheckOutSum,0) ELSE '' END AS PGHJHGSL,
ppd.PronoteMachineId AS JQSB,(SELECT '['+cast(pdmpro.ProductName AS varchar)+':'+ cast(isnull(pdm.PronoteQuantity,0) AS varchar) +'('+pdm.ProductUnit+')'+'],'
FROM PronotedetailsMaterial pdm LEFT JOIN Product pdmpro ON pdmpro.ProductId = pdm.ProductId WHERE pdm.PronoteHeaderID = pdd.PronoteHeaderId FOR xml path('')) AS YL,
pro.ProductDescription AS SPMS FROM PronoteHeader ph
left JOIN ProduceInDepotDetail pdd ON pdd.PronoteHeaderId = ph.PronoteHeaderId
LEFT JOIN Product pro ON pro.ProductId = pdd.ProductId
LEFT JOIN PronoteProceduresDetail ppd ON ppd.PronoteHeaderID = ph.PronoteHeaderID
LEFT JOIN WorkHouse wh ON wh.WorkHouseId = ppd.WorkHouseId
WHERE 1 = 1 AND ph.PronoteDate BETWEEN '2012-09-11' AND '2013-07-19' AND (wh.Workhousename LIKE '%射出%' OR wh.Workhousename LIKE '%品管%') and pro.ProductName is nOT NULL order by ph.PronoteDate

结果如下：

其中相同编号的数据，我只要最后一条，求大神帮忙，谢谢~
中间代码都是查询列，大家主要看第一行和from后面的就好了！

参考技术A select 主表 DISTINCT 字段1 字段2+++++ 参考技术B 在所有字段的前面，加上一个 distinct