Single filter not working when where clause have specified value [duplicate]

     
  

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I set my datatable only show data which start with OQC.


require('ssp.class.join.php' );
$joinQuery = "FROM `monitor` AS `a` JOIN `sym_category` AS `b` JOIN `model_cat` AS `c`";   $joinQuery.= "ON (`b`.`id_sym` = `a`.`id_sym`) AND (`c`.`id_mod` = `a`.`id_mod`)";   $joinQuery.= " WHERE `a`.`id_car` LIKE 'OQC%'";
echo json_encode(   SSP::simple( $_GET $sql_details $table