Retrieve data from MySQL using Node.JS in nested JSON format

Question

I have the following sql tables enter image description here

enter image description here

Now I want to get all the data in a single query I am using Node.JS and I wrote the following query

SELECT * FROM person_table INNER JOIN event_table ON person_table.person_id = event_table.person_id

Now I get the following response enter image description here

but I want output as follows which is nested json format enter image description here