从每组mysql获得前3名最高记录

Question

我有一个桌上学生。我需要每组最高的3个最高记录。该查询应适用于动态添加的组。无需在查询中设置组的默认值。

学生表：

id    name    mark       subject
--------------------------------------
1     kannan     60         French
2     balan      77         French
3     raja       88         French
4     sheik      78         French
5     satheesh   98         French
6     Ravi       90         French
7     Vishnu     90         English
8     siva       100        English
9     suresh     50         English
10    ramesh     59         English
11    ganesh     97         English
12    david      58         English

预期结果：

name      mark    subject
---------------------------
Ravi      90      French
Satheesh  98      French
raja      88      French
siva      100     English
ganesh    97      English
ramesh    59      English

我试过查询：

SELECT name, mark, subject from (SELECT name, mark, subject order by mark 
desc LIMIT 3) as ss group by subject, mark;

但我没有得到正确的值。

Answer 1

(SELECT NAME ,mark, SUBJECT FROM `student ` WHERE SUBJECT = 'French' ORDER BY  mark DESC LIMIT 3)
UNION 
(SELECT NAME ,mark, SUBJECT FROM `student ` WHERE SUBJECT = 'English' ORDER BY  mark DESC LIMIT 3)