Re: SQL COUNT - detail record count on header records

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

one way... use a common table expression...


WITH det(fld1, fld2) AS (select detail_key, count(*) from details)
  SELECT header.*, det.fld2
   FROM header
  JOIN det on header_key = det.fld1


===========================================================
R. Bruce Hoffman, Jr.
 -- IBM Certified Specialist - AS/400 Administrator
 -- IBM Certified Specialist - RPG IV Developer

"America is the land that fought for freedom and then
  began passing laws to get rid of it."

     - Alfred E. Neuman

-----Original Message-----
From: Patrick L Archibald <Patrick.Archibald@HOMETELCO.COM>
To: MIDRANGE-L@midrange.com <MIDRANGE-L@midrange.com>
Date: Tuesday, April 10, 2001 2:02 PM
Subject: SQL COUNT - detail record count on header records


>Hi
>
>I've racked my brains and searched high and low.
>I can't find the correct SQL SELECT statement to
>count the number of records in a detail file and
>show that count in my header record.
>
>The following SELECT statement gives me what I want
>except I want to see zero in the count field if
>there are no matching records in the detail file.
>
>select a.*, b.count from som.som022clsd as a, (select phonenum,
>ordrnmbr, count(*) as count from som.sompfa21 group by phonenum,
>ordrnmbr) as b where a.phonenum = b.phonenum and a.ordrnmbr =
>b.ordrnmbr and a.conumber = '08' and a.workdate between 20010301
>and 20013030
>
>Previously I wanted to sum a total in a detail file and show
>it along the header fields but couldn't figure that out either.
>Again I want to show zero in the sum field if there are no
>matching records in the detail file.
>
>Can someone please point me in the right direction?
>
>Thanx, PLA
>/
>/ Patrick L Archibald
>/ http://HomeTelco.com/pla/
>/
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