Status: Solved
Priority: Medium
Security: Public
Views: 585
Last Modified: 2012-12-27

Use Aggregate in Update Query Access

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

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Any ideas?

ClaudeWalker

Asked: 2012-12-27

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1 Solution

ClaudeWalkerAuthor Commented: 2012-12-27

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

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LVL 61

mbizupCommented: 2012-12-27

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.

ClaudeWalkerAuthor Commented: 2012-12-27

That's the only thing that worked :)

LVL 26

jerryb30Commented: 2012-12-27

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

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Use Aggregate in Update Query Access

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