From: | "Josh Berkus" <josh(at)agliodbs(dot)com> |
---|---|
To: | Stephan Szabo <sszabo(at)megazone23(dot)bigpanda(dot)com>, Joseph Shraibman <jks(at)selectacast(dot)net> |
Cc: | "pgsql-sql(at)postgresql(dot)org" <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: count() and multiple tables |
Date: | 2001-03-20 04:46:39 |
Message-ID: | web-27008@davinci.ethosmedia.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-sql |
Stephan, Joseph,
> Because d.id was guaranteed to be unique, you might be able to
> count(distinct d.id) and get the result you want. [I think the
> subquery is a nicer way of representing it]
Plus a several SQL implementations don't implement the DISTINCT until
after the COUNT, reuslting in a still-inflated (and sometimes varying!)
COUNT. It won't work properly in T-SQL or MS Office SQL, for example.
-Josh Berkus
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