Solved

Synchronize a Master column with its detail totals

Posted on 2006-11-06
5
309 Views
Last Modified: 2008-02-26
UPDATE MASTER SET total = (SUM(detail.balance))
INNER JOIN DETAIL ON detail.ID = master.ID
WHERE master.total <>  (SUM(detail.balance))

I already know the above is incorrect, so here is my question

how would I UPDATE only those MASTER rows that had a total column that did not match the sum of the detail.balance column or would I have to just zero the total column and do something like this->

UPDATE MASTER SET total = total + detail.balance
INNER JOIN DETAIL ON detail.ID = master.ID

thanks,
arw
 
0
Comment
Question by:ARW
  • 2
  • 2
5 Comments
 
LVL 142

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 17882849
UPDATE MASTER SET total = (SUM(detail.balance) FROM detail where  detail.ID = master.ID )
WHERE master.total <>  (SUM(detail.balance) FROM detail where  detail.ID = master.ID )
or master.total is null
0
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 17882932
Hi Angerl,
 Will it work ? it will give an error i think since u are trying to update using an aggregate function
0
 

Author Comment

by:ARW
ID: 17882951
This works though you have to add SELECT to the beginning of the subqueries

thanks again,
arw
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 17883503
indeed, i forgot it in the copy/paste operation:

UPDATE MASTER SET total = (select SUM(detail.balance) FROM detail where  detail.ID = master.ID )
WHERE master.total <>  (select SUM(detail.balance) FROM detail where  detail.ID = master.ID )
or master.total is null

glad I could help, sorry for the missing SELECT...
0
 

Author Comment

by:ARW
ID: 17884024
no problem... the OR in the WHERE clause was something I would have forgot for sure without you having added it.
thanks
~aw
0

Featured Post

Zoho SalesIQ

Hassle-free live chat software re-imagined for business growth. 2 users, always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
For both online and offline retail, the cross-channel business is the most recent pattern in the B2C trade space.
Via a live example, show how to extract information from SQL Server on Database, Connection and Server properties
Viewers will learn how to use the INSERT statement to insert data into their tables. It will also introduce the NULL statement, to show them what happens when no value is giving for any given column.

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now