gistfile1.txt

DELETE FROM voters
WHERE homeowner = 1
AND employed = 1
AND children_count = 0
AND party_duration < 3
AND (SELECT voters.id
     FROM voters
     INNER JOIN votes
     ON voters.id = votes.voter_id
     INNER JOIN congress_members
     ON votes.politician_id = congress_members.id
     GROUP BY votes.politician_id
     HAVING congress_members.grade_current > 12) >= 1;