Add Trimestre prompt in BI publisher depending on assingment table

Summary

I want to add a prompt in bi publisher report which is Trimestre and depends on per_all_assignments_m (effective_start_date)

Content

Hello,

How can i define on sql prompt Trimestre ,with 4 tirmestre (t1,t2,t3,t4) 

and then want to create the filtrer where effective_start_date in (:param) 

Many thanks

Jihene