tsql - sql select count -


i have 2 tables: calls , attachments , want display that's in calls table display whether call has attachments, - determining if there attachment record call_id in it. maybe there attachments, maybe there isn't.

calls
call_id
title
description

attachments
attach_id
attach_name
call_id

if write: 

select call_id, title, description calls

to give me list of calls....

how can include whether call record has attachment(s) or not?

thanks,

you can use outer join accomplish this:

select c.call_id, title, description, attach_name calls c left outer join attachments on c.call_id = a.call_id

the above display (null) attach_name if no attachment found. can use isnull() supply default value if no attach_name found, such as:

select c.call_id, title, description,      isnull(attach_name, '(no attachment)') attach_name calls c left outer join attachments on c.call_id = a.call_id

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