flight学习笔记
Flight::db()-> getOne("select 1");
返回结果:1
Flight::db()-> getRow ("select 1, 2 from a limit 1");
返回结果:array(“1","2")
Flight::db()-> getCol ("select 1 from a limit 2");
返回结果:array(“1","1")
Flight::db()-> getAll("select 1, 2, from a limit 2");
返回结果:array(array(“1","2"), array(“1","2"));