Re: where clauses and multiple tables

On Sep 8, 2009, at 4:02 PM, David W Noon wrote:

> On Tue, 8 Sep 2009 14:25:20 -0700, Scott Frankel wrote about [GENERAL]
> where clauses and multiple tables:
>
>> Is it possible to join tables in the where clause of a statement?
> [snip]
>> Given a statement as follows:
>>
>>  SELECT foo.foo_id, foo.name
>>  FROM foo, bar
>>  WHERE foo.bar_id = bar.bar_id
>>  AND bar.name = 'martini';
>
> Just use an IN predicate:
>
> SELECT foo_id, name FROM foo
> WHERE bar_id IN (SELECT bar_id FROM bar WHERE name = 'martini');
>
> This is frequently called a semi-join.

This looks very promising.  Thanks for the info!
Scott


> --
> Regards,
>
> Dave  [RLU #314465]
> =
> ======================================================================
> david.w.noon@ntlworld.com (David W Noon)
> =
> ======================================================================
>
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Scott Frankel
President
Circle-S Studios

www.circlesfx.com
510-339-7477 (o)
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