Check if row exists in database

[MyChemicalSelf]

Im currently working on something for gcbos that requires me to check if there is a record in the database (return mysql_num_rows($result > 0) ? true : false;) and i was wondering if vbulletin had this build into the database system (vbulletin->db). Any help is appreciated :)

[compwhizii]

$vbulletin->db->num_rows($result);

[MyChemicalSelf]

$vbulletin->db->num_rows($result);

Thanks, helped a lot!