| From: | Joshua Drake <jd(at)commandprompt(dot)com> |
|---|---|
| To: | "Mark Wong" <markwkm(at)gmail(dot)com> |
| Cc: | "Postgresql PDX_Users" <pdxpug(at)postgresql(dot)org> |
| Subject: | Re: 9/18 Visual Planner Meeting Wrapup |
| Date: | 2008-09-19 22:02:25 |
| Message-ID: | 20080919150225.383a35f3@jd-laptop |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pdxpug |
On Fri, 19 Sep 2008 14:53:15 -0700
"Mark Wong" <markwkm(at)gmail(dot)com> wrote:
> Can anyone come up with an example of a meaningful query where there
> is a join that does not use an implicit or explicit foreign key?
Only partial. A LEFT or RIGHT JOIN will do this but it needs a partial
key to work.
So: No.
Sincerely,
Joshua D. Drake
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