@KrishnaPG I guess you are referring to Best practice for drilling into more detail on a single record and pulling more fields from the database?
If you are displaying only some data on the parent template and need the detail data when parent containers are clicked, then separating the detail subscription is wise.
But if you are creating a parent template that consists of childs and each child is to display the whole data the first time, than creating the monolithic subscription from the parent is a better choice.