Re: HELP: SQL count(*) to weed out duplicates

["R. Bruce Hoffman, Jr." <rbruceh@xxxxxxxxxxxxx>]

... having count(*) > 1

Having statements are applied after the selection and after grouping.

===========================================================
R. Bruce Hoffman, Jr.
 -- IBM Certified AS/400 Professional System Administrator
 -- IBM Certified AS/400 Professional Network Administrator

"The sum of all human knowledge is a fixed constant.
    It's the population that keeps growing!"

-----Original Message-----
From: Bale, Dan <DBale@TFSA.Textron.com>
To: 'MIDRANGE-L@midrange.com' <MIDRANGE-L@midrange.com>
Date: Monday, February 21, 2000 5:06 PM
Subject: HELP: SQL count(*) to weed out duplicates


>It's been awhile, but...
>
>Today a requirement came up where I have to identify duplicate keys in a
>file.  In the past, I used SQL to do this and seem to recall using count(*)
>in some fashion, i.e.:
>
>  select pdiv, ptyp, pvnd, ppo, count(*) from pohedrl3
>  group by pdiv, ptyp, pvnd, ppo
>
>This results in:
>
>               VENDOR
>  DIV  TYPE    NUMBER   PO NUMBER     COUNT ( * )
>  ---  ----  --------  ----------  --------------
>   1   MSC    70,225       8,101               1
>   1   MSC   110,275       7,724               1
>   1   MSC   160,415       7,725               1
>   1   MSC   160,415       7,726               1
>   1   MSC   160,415       7,727               1
>   1   MSC   160,415       7,728               1
>(continued for 10000 more rows)
>
>How do I specify that I only want count(*) > 1?  Specifying "where count(*)
>> 1" causes numerous syntax errors, no matter where I place it.  A look at
>the infocenter SQL manuals yielded no clues.
>
>If someone answers this, could you kindly reply to DBale@TFSA.Textron.com
as
>well as MIDRANGE-L so that I get this ASAP?  Thanks!
>
>- Dan Bale
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