SQL Server-如何显示最新记录

我在SQL Server中有一个表

ID PID LASTMODIFIED REASON
1  1   01/01/2011   XYZ
2  1   04/01/2011   XYY
3  2   05/01/2011   ZZZ
4  2   03/01/2011   ABC

我想根据每个PID的最大值（LASTMODIFIED）选择行。对于EX，select应返回以下内容：

ID PID LASTMODIFIED REASON
2  1   04/01/2011   XYY
3  2   05/01/2011   ZZZ

请帮助我使用SQL语句。多谢各位

SELECT A.ID, A.PID, A.LastModified, A.Reason 
FROM MyTable AS A INNER JOIN (
SELECT PID, MAX(LastModified) AS MaxDate
FROM MyTable
GROUP BY PID) AS B ON A.PID = B.PID AND A.LastModified = B.MaxDate