MySQL server error report:Array ( [0] => Array ( [message] => MySQL Query Error ) [1] => Array ( [sql] => SELECT region_name FROM `jh368_com`.`ecs_region` WHERE region_id in (,) order by region_id ) [2] => Array ( [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 ') order by region_id' at line 1 ) [3] => Array ( [errno] => 1064 ) )