How I can fetch licence details, which stored against employee’s job profile?

if employee has multiple assignments, and I want to get licence detail of assignment then how I can fetch by using sql. I wrote the sql query to fetch all licences which are expiring soon, but it is giving duplicates records for all assignments, as I have link with all licences tables with assignment with person id. I checked all licences tables but there is not 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

hrt_profile_relations