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Re^2: database selecting then validating

by Anonymous Monk
on May 25, 2012 at 11:33 UTC ( #972404=note: print w/ replies, xml ) Need Help??

in reply to Re: database selecting then validating
in thread database selecting then validating

You could simplify that into (assuming a unique constraint on (empid, dept)):

my $sql = 'select 1 from users where empid=? and dept=?'; if ($dbh->selectrow_array($sql, undef, $empid, $dept)) { # valid } else { # not valid }

...I'm always a bit wary of using Count(*) for exists-or-not-exists queries

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