表結構指令碼： CREATE TABLE `student_grade` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(64) DEFAULT NULL, `grade` int(11) DEFAULT NULL, `subject` varchar(64) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
表資料：
--方法1：   SELECT s.* FROM student_grade s WHERE s.grade = ( SELECT MAX(grade) FROM student_grade WHERE NAME = s.`name` ORDER BY `name` ) --方法2：  

SELECT s.* FROM student_grade s, ( SELECT `name`, MAX(grade) grade FROM student_grade GROUP BY `name` ) b WHERE s. `name` = b.`name` AND s.grade = b.grade 
--方法 SELECT s.*

FROM student_grade s INNER JOIN ( SELECT `name`, MAX(grade) grade FROM student_grade GROUP BY `name` ) b ON s. NAME = b. NAME AND s.grade = b.grade