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Return entire row which contains max value

In an MS Access Query, How do I return the entire row which contains the max() value of some field.
For instance, let's say I have a CustomerID field and an invoice_date field and the rest of the record, whatever it may be. There may be many records with this customerID, but I want to return the entire record that contains the newest (or oldest) invoice_date.
I usually do this with two queries, one to find the max(or min) date for the customer, then a second query to pull the entire record based on a two filed join on the customerID and invoice_date fields.
Is there a one-step way of doing this or is this the way that everyone does this?
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LouieGee
Asked:
LouieGee
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2 Solutions
 
Patrick MatthewsCommented:
SELECT s.*
FROM SomeTable s
WHERE s.SomeField =
    (SELECT Max(s2.SomeField) FROM SomeTable s2)
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LouieGeeAuthor Commented:
mathewspatrick,

You're doing a sub-select, which is what I figured, but it would have to be joined on both the customer ID   AND   the max value.
So in your example, how would that look?
Can a sub select be used to join on two fields?
Do you have to do two sub-selects?
Is there any SQL functionality to do this with one SQL command?
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Patrick MatthewsCommented:
Sorry, missed the customer part.

SELECT s.*
FROM SomeTable s INNER JOIN
    (SELECT s2.CustomerID, Max(s2.OtherField) AS MaxValue
    FROM SomeTable s2
    GROUP BY s2.CustomerID) AS z ON s.CustomerID = z.CustomerID AND s.[Value] = z.MaxValue
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imitchieCommented:
Check if this works - haven't got Access on me, but worth trying

SELECT s.*
FROM SomeTable s
WHERE s.SomeField =
    (SELECT Max(s2.SomeField) FROM SomeTable s2 WHERE (s.CustomerID = s2.CustomerID))
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LouieGeeAuthor Commented:
The syntax in Access SQL is:
SELECT *
FROM invoices AS Inv1
WHERE (((Inv1.InvoiceDate)=Any (SELECT max([invoicedate]) FROM invoices WHERE [custnum]=Inv1.[custnum])));

Of course, Access likes to go a little crazy with parenthesis, but there it is.

So from what you guys are saying, there is no better way. Either you have to do two separate queries, which is how I normally do it   orrrrr   do a sub-select (which is, in effect, two queries).

Thanks, will figure out points soon unless someone else throws a hail-mary.
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Patrick MatthewsCommented:
LouieGee,

Yes, you either need a subquery, or two different queries.

BTW, did you try my second suggestion?  It ought to have worked...

Regards,

Patrick
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LouieGeeAuthor Commented:
Matthew's first answer lacked only the second 'Where' clause, which was trivial to fix once I looked at the whole picture. Matthew's second answer works but Access seems to like to reformat it and then editing it causes syntax errors until you get it just right. Imitchie's answer was the same as Matthew's first one, but added the where clause for which Imitchie gets some of the points. (The missing where clause was trivial to fix)
My main question was: is there a better way, and the answer is "NO".
Actually, the answer is "Slightly"; now at least I can save it in one query and I won't have to remember that query 1 feeds into query 2.
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LouieGeeAuthor Commented:
Oh,
Sorry,

A big thanks to Patrick (not matthew) and Imitchie.

Louie G
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