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for my $artistkey (0..$#is_guest) { ... $sth->execute($artist_alias[$artistkey], $email[$artistkey], $is_gu +est[$artistkey]); }
next if ($sth->rows >= 1) { my $sth = $dbh->prepare("UPDATE artists SET email=? WHERE alias= +?"); $sth->execute($email[$artistkey], $artist_alias[$artistkey]); }