From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Alexander Farber <alexander(dot)farber(at)gmail(dot)com> |
Cc: | pgsql-general <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: DELETE and JOIN |
Date: | 2017-03-13 16:53:36 |
Message-ID: | 13377.1489424016@sss.pgh.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
Alexander Farber <alexander(dot)farber(at)gmail(dot)com> writes:
> ...
> However, before saving a review, I would like to delete all previous
> reviews coming from the same IP in the past 24 hours:
> ...
> I have the feeling that the _author_ip variable is not really necessary and
> I could use some kind of "DELETE JOIN" here, but can not figure it out.
Sure, see the USING clause in DELETE. Although your example seems a
bit confused, since you're not actually referring to _author_ip anywhere.
And if you meant "_author_ip" where you wrote "u._author_ip", that's in
a sub-SELECT, where you could just add a join to words_users without
needing any nonstandard DELETE syntax.
regards, tom lane
From | Date | Subject | |
---|---|---|---|
Next Message | Adrian Klaver | 2017-03-13 16:55:50 | Re: DELETE and JOIN |
Previous Message | Alexander Farber | 2017-03-13 16:39:09 | DELETE and JOIN |