Question

I have a database with many rows and I would like to consecutively aggregate say 10 rows and calculate the average of one column. So row 1 to 10 will be average value no. one, row 11 to 20 will be average value no. two, etc.

Can this be done in MySql?

Answer 1

You’ll need to GROUP BY FLOOR(something/10) to group each 10 rows. A primary autoincrement key without gaps would be best for this.

SELECT FLOOR(something/10) as start_id, AVG(yourAmount)
FROM yourTable
GROUP BY FLOOR(something/10)