Hi there! I have two tables:
Customer (ID, Name)
Invoice (ID, Date, Customer, Amount)
and want to select only the *last* invoice for each customer. It's easy
to get each customer's last invoice date:
SELECT Customer.Name, MAX(Invoice.Date)
FROM Customer INNER JOIN Invoice ON Custimer.ID = Invoice.Customer
GROUP BY Customer.Name
but I run into trouble when I try to include the Invoice.Amount. How to
do this in one SQL statement? I came up with:
SELECT Customer.Name, Invoice.Date, Invoice.Amount
FROM Customer INNER JOIN Invoice ON Custimer.ID = Invoice.Customer
WHERE Invoice.ID IN
(
SELECT MID(key, INSTR(key, ":") + 1) FROM
(
SELECT Customer, MAX(CLNG(Invoice.Date) & ":" & CLNG(Invoice.ID))
AS key
FROM Invoice
GROUP BY Customer
)
)
which leaves me somewhat unsatisfied. (And it won't work if the same
customer is invoiced twice on the same day.) There's got to be a more
elegant way to do this. Any ideas? 1 4810
See:
Getting a related field from a GroupBy (total) query
at: http://www.mvps.org/access/queries/qry0020.htm
for 4 approaches to this query.
--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.
"Herman Beeksma" <he****@opticrop.nl> wrote in message
news:9d***************************@news.concepts.n l... Hi there! I have two tables:
Customer (ID, Name) Invoice (ID, Date, Customer, Amount)
and want to select only the *last* invoice for each customer. It's easy to get each customer's last invoice date:
SELECT Customer.Name, MAX(Invoice.Date) FROM Customer INNER JOIN Invoice ON Custimer.ID = Invoice.Customer GROUP BY Customer.Name
but I run into trouble when I try to include the Invoice.Amount. How to do this in one SQL statement? I came up with:
SELECT Customer.Name, Invoice.Date, Invoice.Amount FROM Customer INNER JOIN Invoice ON Custimer.ID = Invoice.Customer WHERE Invoice.ID IN ( SELECT MID(key, INSTR(key, ":") + 1) FROM ( SELECT Customer, MAX(CLNG(Invoice.Date) & ":" & CLNG(Invoice.ID)) AS key FROM Invoice GROUP BY Customer ) )
which leaves me somewhat unsatisfied. (And it won't work if the same customer is invoiced twice on the same day.) There's got to be a more elegant way to do this. Any ideas? This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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