Re: SQL COUNT - detail record count on header records

[kenney@xxxxxxxxxxx]

I beleive you may need to use a union with an existential qualifer.

 

Example

Select header_number,count(*)  from headertable,member_table

 where member_number=header_number group by header_number

Union

Select header_number,0 from headertable

where not exists(select * from member_table where member_number=header_number)  

Michael Kenney
IT Services
University of Windsor

 
"Patrick L Archibald" <Patrick.Archibald@hometelco.com>
Sent by: owner-midrange-l@midrange.com
04/10/2001 01:44 PM AST
Please respond to MIDRANGE-L

To: <MIDRANGE-L@midrange.com>
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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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