Re: is a 'pairwise' possible / feasible in SQL? - Mailing list pgsql-general

From David Wilson
Subject Re: is a 'pairwise' possible / feasible in SQL?
Date
Msg-id e7f9235d0808041202m157652c5xae27c08700a52d47@mail.gmail.com
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In response to is a 'pairwise' possible / feasible in SQL?  (Rajarshi Guha <rguha@indiana.edu>)
Responses Re: is a 'pairwise' possible / feasible in SQL?
List pgsql-general
On Mon, Aug 4, 2008 at 2:08 PM, Rajarshi Guha <rguha@indiana.edu> wrote:

> select count(aid) where cid = 123 and cid = 456;
>
> but I was wondering whether I could construct a single SQL statement to do
> this.
>
> Any pointers would be appreciated,

Typed into gmail, so may need some tweaking, but something to the effect of:

select count(*) from table a inner join table b on a.aid=b.bid group
by a.cid,b.cid;

should do the trick, I'd think...

--
- David T. Wilson
david.t.wilson@gmail.com

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