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Boolean aggregation
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create table t (c1 text, c2 text); insert into t (c1, c2) values ('a','x'), ('a','y'), ('a','z'), ('b','x'), ('c','y'), ('d','x'), ('d','x'), ('e','x'), ('e','y'); -- not z select c1 from t group by c1 having not bool_or(c2 = 'z') ; -- only x select c1 from t group by c1 having bool_and(c2 = 'x') ; -- must have x and y and nothing else select c1 from t group by c1 having bool_or(c2 = 'x') and bool_or(c2 = 'y') and bool_and (c2 in ('x','y')) ; -- at least x and y select c1 from t group by c1 having bool_or(c2 = 'x') and bool_or(c2 = 'y') ;
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