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CREATE TABLE plans ( id serial, description varchar ); INSERT INTO plans VALUES (1, 'Plane One'), (2, 'Another Good Plane'); CREATE TABLE transactions ( id serial, plan_id int, success boolean ); INSERT INTO transactions (plan_id, success) VALUES (1, True), (1, True), (1, True), (2, True), (2, False), (2, True); SELECT plans.id, COUNT(plan_id) all_transactions, SUM(CASE WHEN success THEN 1 ELSE 0 END) success_transactions FROM plans JOIN transactions ON transactions.plan_id = plans.id GROUP BY plans.id HAVING COUNT(plan_id) = SUM(CASE WHEN success THEN 1 ELSE 0 END) ;

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