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MySQL query to display ranks of multiple columns?
For this, use FIND_IN_SET() method. Let us first create a table −
mysql> create table DemoTable634 (FirstName varchar(100),Marks int,Age int); Query OK, 0 rows affected (0.69 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable634 values('John',60,23); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable634 values('Chris',80,21); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable634 values('Robert',70,24); Query OK, 1 row affected (0.22 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable634;
This will produce the following output −
+-----------+-------+------+ | FirstName | Marks | Age | +-----------+-------+------+ | John | 60 | 23 | | Chris | 80 | 21 | | Robert | 70 | 24 | +-----------+-------+------+ 3 rows in set (0.00 sec)
Following is the query to display ranks of multiple columns −
mysql> SELECT FirstName,Marks,Age, FIND_IN_SET( Marks,( SELECT GROUP_CONCAT( Marks ORDER BY Marks DESC ) FROM DemoTable634)) AS RankOfMarks, FIND_IN_SET(Age,( SELECT GROUP_CONCAT( Age ORDER BY Age DESC ) FROM DemoTable634) ) AS RankOfAge FROM DemoTable634;
This will produce the following output displaying the rank on the basis of marks and age −
+-----------+-------+------+-------------+-----------+ | FirstName | Marks | Age | RankOfMarks | RankOfAge | +-----------+-------+------+-------------+-----------+ | John | 60 | 23 | 3 | 2 | | Chris | 80 | 21 | 1 | 3 | | Robert | 70 | 24 | 2 | 1 | +-----------+-------+------+-------------+-----------+ 3 rows in set (0.01 sec)
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