Want Row Number on Group of column in MY SQL?

Question

I have one table in MYSQL It has data like

Id Name 
1  test
1  test
1  test123
2  test222
3  test333

I want the data like

Id Name     RowN         


        

Answer 1

Here's another way with a query that is simpler (at least for me):

SELECT
a.Id, a.Name,
(SELECT COUNT(*) FROM test
 WHERE Id = a.Id AND `Name` = a.Name AND row_id < a.row_id) AS RowNum
FROM test AS a
ORDER BY a.row_id;

This supposes there exists a global row_id (for instance an auto-increment primary key in your table).