Scott Haneda <[EMAIL PROTECTED]> wrote:
> I currently run this, which is 2 hits to the database.
>
> Select serial from blacklist where serial = '23'
> Select serial from seriallist where serial = '23'
>
> I only desire to know if either of the 2 has at least one row, I am only
> testing for existence here. Is there some way I can get around 2 queries
> and do this as one?
>
Use UNION:
http://www.mysql.com/doc/en/UNION.html
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