efficient way to fetch data

DECLARE @PageNum AS INT;
DECLARE @PageSize AS INT;
SET @PageNum = 2;
SET @PageSize = 10;
WITH OrdersRN AS
(
    SELECT ROW_NUMBER() OVER(ORDER BY OrderDate, OrderID) AS RowNum
          ,OrderID
          ,OrderDate
          ,CustomerID
          ,EmployeeID
      FROM dbo.Orders
)
SELECT *
  FROM OrdersRN
 WHERE RowNum BETWEEN (@PageNum - 1) * @PageSize + 1
                  AND @PageNum * @PageSize
 ORDER BY OrderDate
         ,OrderID;