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CREATE TABLE t (id text, treatment int, outcome int); INSERT INTO t VALUES ('a', 1, 0), ('a', 1, 1), ('b', 0, 1), ('c', 1, 0), ('c', 0, 1), ('c', 1, 1);
CREATE TABLE
INSERT 0 6
SELECT ever_treated, sum(outcome_ct) AS count FROM ( SELECT id , max(treatment) AS ever_treated , count(*) FILTER (WHERE outcome = 1) AS outcome_ct FROM t GROUP BY 1 ) sub GROUP BY 1;
ever_treated
count
0
1
1
3
SELECT 2