# 函数原型 ~~~ public function prefix($mixPrefix); ~~~ # 用法如下 ~~~ # SELECT SQL_CALC_FOUND_ROWS `test`.* FROM `test` WHERE `test`.`id` = 5 database::table ( 'test' ) ->prefix('SQL_CALC_FOUND_ROWS') ->where('id','=',5) ->get (); # SELECT SQL_NO_CACHE `test`.* FROM `test` WHERE `test`.`id` = 5 database::table ( 'test' ) ->prefix('SQL_NO_CACHE') ->where('id','=',5) ->get (); ~~~