MySQL query to generate row index (rank) in SELECT statement?

To generate a row index, use ROW_NUMBER(). Let us first create a table −

mysql> create table DemoTable (    Name varchar(40) ); Query OK, 0 rows affected (0.49 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values('Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('Chris'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values('Chris'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Robert'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Robert'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('Adam'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Adam'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values('Adam'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values('Adam'); Query OK, 1 row affected (0.08 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+--------+ | Name   | +--------+ | Chris  | | Chris  | | Chris  | | Robert | | Robert | | Adam   | | Adam   | | Adam   | | Adam   | +--------+ 9 rows in set (0.00 sec)

Following is the query to generate a row index in MySQL SELECT statement. Here, we have set rank for duplicate names −

mysql> select Name, row_number() over (partition by Name) as `Rank` from DemoTable;

This will produce the following output −

+--------+------+ | Name   | Rank | +--------+------+ | Adam   | 1    | | Adam   | 2    | | Adam   | 3    | | Adam   | 4    | | Chris  | 1    | | Chris  | 2    | | Chris  | 3    | | Robert | 1    | | Robert | 2    | +--------+------+ 9 rows in set (0.00 sec)