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Update table field with sum of other table field

Posted on 2004-11-04
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Last Modified: 2009-12-16
I am using SQL Server 2000.

I have a table called tblPartners and I want to run an sp every night that updates a field called TotalPaid.

The table that holds payment info is called tblPaymentInstalments and the field is called InstalmentAmnt.

The 2 tables are related via 2 other tables as follows:


tblPaymentInstalments inner join
tblPayments on tblPaymentInstalments.PaymentRef = tblPayments.PaymentRef inner join
tblProposals on tblPayments.ProposalNo = tblProposals.ProposalNo inner join
tblPartners on tblProposals.PartnerID = tblPartners.PartnerID


How do I write the sp that will update tblPartners.TotalPaid with the sum(tblPaymentInstalments.InstalmentAmnt) for each Partner?

Thanks.
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Question by:naqayya
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Lowfatspread earned 800 total points
ID: 12497117
UPDATE TBLPARTNERS
  SET TOTALPAID = u.amt
 from tblpartners as p
 inner Join (select pro.partnerID,sum(pi.InstallmentAmnt) as amt
                   from  tblPaymentInstalments as pi
                  inner join tblPayments as P
                     on PI.PaymentRef = P.PaymentRef
                  inner join tblProposals as Pro
                     on P.ProposalNo = Pro.ProposalNo
                   group by pro.partnerID
                   having sum(pi.InstallmentAmnt) <> 0
                  )
     on U.PartnerID = P.PartnerID

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Author Comment

by:naqayya
ID: 12525342
Thanks Lowfatspread, that worked beautifully!

(you forgot the 'as u' after subquery bracket, but no probs)
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