使用来自另一个表的数据进行一些计算来更新一个表的多行.

问题描述

我有3张桌子，我的要求是参考另一个桌子来更新一个桌子的一些记录(使用数学公式).
样品表和样品数据如下:-

筛选的 ECode CountyGroupname 项目名称 工作类型 持续时间 101 NY Proj1 WT1 10 101 NY Proj2 WT2 20 102 NP Proj1 WT1 20 101 NP Proj3 WT3 10 102 NK Proj1 WT1 20


NonProd ECode CountyGroupName 持续时间 101 NY 10 102 NP 10 103 NY 10


Prod ECode CountyGroupname 持续时间 101 NY 30 101 NP 35 102 ND 35 103 NY 40 104 GP 45

我要根据以下条件将过滤的"表列名称更新为持续时间":-
更新已过滤
设置Duration =(公式将是:-Filtered.Duration * NonProd.Duration)/Prod.Duration when
条件1:Filtered.CountyGroupname = NonProd.CountyGroupname = Prod.CountyGroupName
条件2:Filtered.Ecode = NonProd.Ecode = Prod.ECode
哪里存在
()

注意:-按照逻辑，只有过滤表"中持续时间的前3行得到了更新.其余字段将保持不变.

I have 3 table and my requirement is to update few records of a table(Using mathematical formula) with refence of the another table.
Sample table and sample data are as below:-

Filtered

ECode	CountyGroupname	Projectname	Worktype	Duration
101	NY	Proj1	WT1	10
101	NY	Proj2	WT2	20
102	NP	Proj1	WT1	20
101	NP	Proj3	WT3	10
102	NK	Proj1	WT1	20

NonProd

ECode	CountyGroupName	Duration
101	NY	10
102	NP	10
103	NY	10

Prod

ECode	CountyGroupname	Duration
101	NY	30
101	NP	35
102	ND	35
103	NY	40
104	GP	45

I want to update the "Filtered" Table Column Name is "Duration" as per the condition that:-
Update Filtered
Set Duration= (Formula will be:- Filtered.Duration * NonProd.Duration)/Prod.Duration when
Condition 1: Filtered.CountyGroupname=NonProd.CountyGroupname=Prod.CountyGroupName
Condition 2: Filtered.Ecode=NonProd.Ecode=Prod.ECode
where exists
()

Note:- As per the logic only first 3 Rows Of the duration in "Filtered Table" got updated.Rest of the field will not be changed.

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