Message:    MySQL Query fail: DELETE FROM `addressbook` AS ab JOIN `addressbook_relation` AS abr ON ab.`coid` = abr.`contact` WHERE abr.`group` = '2'
MySQL Error:    You have an error IN your SQL syntax; CHECK the manual that corresponds TO your MySQL server version FOR the RIGHT syntax TO USE near 'AS ab JOIN `addressbook_relation` AS abr ON ab.`coid` = abr.`contact` ' at line 1