Problem with record count...

Question

Hi,
I try to solve one problem with count. This problem occurs when I getting multi records that I need to count. Take a look on the following query:
SELECT INVOICE,COUNT(INVOICE)
FROM TABLE WHERE ADDR =
(SELECT ADDR FROM TABLE
WHERE DELEVERY = 'DD'
GROUP BY ADDR||POSTDT
HAVING COUNT(DISTINCT ADDR||POSTDT) > 1)
GROUP BY INVOICE;
I expected to see each invoice with total count invoices that have been delivered to the same address and date. But it's give me only invoice and count 1(itself), regardless if two or more invoices have been delivered to the same address and the same date. I think, that I just lost myself in this query. Hopefully I gave enough information.
Thanks in advance,
Alex

Answer 1

Hi Alex,
there are a couple ways to code this. Just two of them:
SELECT t1.INVOICE,
       t2.total
FROM   TABLE t1,
       (SELECT   ADDR,
                 POSTDT,
                 count(*) total
        FROM     TABLE t2
        WHERE    DELEVERY = 'DD'
        GROUP BY ADDR,
                 POSTDT
        HAVING   COUNT(*) > 1
WHERE  t1.ADDR   = t2.ADDR
AND    t1.POSTDT = t2.POSTDT
SELECT t1.INVOICE,
       (SELECT   count(*)
        FROM     TABLE t2
        WHERE    DELEVERY = 'DD'
                 t2.ADDR   = t1.ADDR
                 t2.POSTDT = t1.POSTDT
        GROUP BY ADDR,
                 POSTDT
        HAVING   COUNT(*) > 1
       )  total
FROM   TABLE t1