How to fetch the no: of weekly inserted records in MySQL

SELECT

  COUNT(*) AS reports_in_week,

  DATE_ADD(created_at, INTERVAL(1-DAYOFWEEK(created_at)) DAY) as start_day,

  DATE_ADD(created_at, INTERVAL(7-DAYOFWEEK(created_at)) DAY) as end_day

FROM

  your_table_name

GROUP BY

  YEAR(created_at) + .01 * WEEK(created_at)

The desired output will be.