ThinkPHP中如何实现查询数据集

// User模型定义namespace appcommonmodel;use thinkModel;class User extends Model{    protected $table = 'User';}

// 控制器中查询所有用户记录namespace appindexcontroller;use appcommonmodelUser;class Index{    public function index()    {        $User = new User();        $userList = $User->select();        return json($userList);    }}

// 控制器中回去性别为女性的用户记录public function index(){    $User = new User();    $userList = $User->where('sex', '女')->select();    return json($userList);}

// 控制器中按照年龄从小到大对结果进行排序public function index(){    $User = new User();    $userList = $User->order('age asc')->select();    return json($userList);}

// 控制器中每页展示10个用户记录public function index(){    $User = new User();    $userList = $User->paginate(10);    return json($userList);}