Question

I am new to mysql. I googled but couldn’t find any satisfactory answer.

Basically, I need to provide rank to student . The only thing to be considered is explained in given example.
Let we have a table student(id,marks,rank).
Now let the entries be

id    marks
1      2
2      2
3      3
4      4 
5      4
6      3
7      3

Here the ranks of id’s : 4 and 5 should be FIRST.
ranks of id’s : 3 , 6 and 7 should be THIRD.
ranks of id’s : 1 and 2 should be SIXTH.
What should be the query ?

Answer 1

Consider implementing ranking on the application side. If it really needs to be on the MySQL side, you can use user-defined variables:

SET @rank = 1, @seq = 1, @last = null;
SELECT *, @rank := if(@last = marks, @rank, @seq) AS rank, @seq := @seq + 1, @last := marks FROM test ORDER BY marks DESC;