Need help to show a calculated data in a Repeating Group

[prottayroy001]

Hello, I am working on a project, in one part, I have a repeating group where I have several lines with multiple data fields like this one:

If I click on any line of this one more repeating group appears like this:

Now my task is to show how many repeating group lines are there in the previous repeating group (Parent Group). For example, as you can see the CV submitted field is empty. if I click that a new repeating group appears with 2 CV’s. now the CV submitted field should show 2 here. How to achieve this? Someone please help.

[onurulukut]

Assuming main RG and the sub RG are connected to different “things” so link two things in DB. for example add a column to main RG that contains the IDs of sub RG things- caretaker CV ids , construction worker CV ids- these will be different so you can count and display them or sort them etc. when adding a new cv ad its ID to corresponding jobs CV_ID list.