Use Aggregate in Update Query Access

ClaudeWalker
ClaudeWalker used Ask the Experts™
on
I am trying to update an invoice total on an invoice table from the lineitem totals on an invoice details table.  I'm finding using an aggregate function within an update query is challenging.

I'm adding these total fields to make it easier for management to gather stats in our small firm.

Here is the SQL that I think should work but it not working and throwing a: "Syntax Error (missing operator) in query expression 't.total from tblPO p inner join..."

UPDATE P
SET p.PO_total = t.total FROM tblPO p 
INNER JOIN
     (SELECT tblPO_Details.PO_ID, SUM(tblPO_Details.subtotal) as total
      FROM tblPO_Details
      GROUP BY tblPO_Details.PO_ID) as t
    ON t.PO_ID = p.PO_ID

Open in new window


Any ideas?
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
View Solution Only
ClaudeWalker

Author

Commented:
I also tried this and it throws "must use updatable query"

UPDATE tblPO 
INNER JOIN
     (SELECT tblPO_Details.PO_ID, SUM(tblPO_Details.subtotal) as total
      FROM tblPO_Details
      GROUP BY tblPO_Details.PO_ID) as t
    ON t.PO_ID = tblPO.PO_ID
SET tblPO.PO_total = t.total

Open in new window

Nerd
Most Valuable Expert 2012
Top Expert 2013
Commented:
As far as I know, you can't use a subquery in your UPDATE statement like this in Access.

A workaround is to use your aggregate query to make a temporary table (turn it into a make table query) and use that table as the source for your UPDATE.
ClaudeWalker

Author

Commented:
That's the only thing that worked :)
jerryb30

Commented:
UPDATE tblPO AS a SET a.po_total = DSum("subtotal","tblPO_Details","po_id = " & [a].[po_id]);

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial