when I M USING 10022 as manager_ID in query A .why mysql showing manager_id as null?

Hi Ayush Sahu, Without seeing the code\screen shot for your issue with the query, the only 'hint' I got from your comment is that the 'manager_ID' number that is to be used is 110022, not '10022' which is an 'employee_ID'. Copy of screen shot from video to help you verify - if this does not fix the issue, reply with a screen shot and I will review again. Hope this helps. Regards, Kev T.

Hi Ayush! Thanks for reaching out. As Kev said the 'manager_ID' number that is to be used is 110022, not 10022 which is an 'employee_ID' Hope this helps. Best, Tsvetelin