How I can fetch licence details, which stored against particular assignment?

Summary:

If employee has multiple assignments, and I want to get licence detail of particular assignment then how I can fetch by using sql. I wrote the sql to fetch all licences which are expiring soon, but it is giving duplicates records for all assignments, as I have link with the all lic tables with assignment with person id. I checked all lic tables but there is no any assignment id.

I used below tables

hrt_profiles_b

hrt_profile_items

hrt_person_qualidfications_v

hrt_content_types_b

hrt_content_items_tl

hrt_certification_items_v

per_all_assignments_m