Report to fetch Element with assignment number and name for employees

Summary:

i am using the below SQL to fetch the details. But the SQL is taking time to fetch the details.

Can anyone please let me know if my i am missing any join

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Code Snippet (add any code snippets that support your topic, if applicable):

select distinct peo.person_number

,prg.assignment_number

,per_name.first_name

,per_name.MIDDLE_NAMES

,per_name.Last_name

,pet.base_element_name

,peev.screen_entry_value

,to_char(peev.effective_start_date, 'DD-MON-YYYY') elementstartdate

,to_char(peev.effective_end_date, 'DD-MON-YYYY') elementenddate