1 CREATE TABLE array_enumerate_fixed_string (a16 Array(FixedString(16)), a32 Array(FixedString(32))) ENGINE = Memory INSERT INTO array_enumerate_fixed_string SELECT arrayMap(x -> toFixedString(toString((x + number) % 64), 16), range(256)), arrayMap(x -> toFixedString(toString((x + number) % 64), 32), range(256)) FROM numbers(10000) SELECT arrayEnumerateUniq(a32) FROM array_enumerate_fixed_string FORMAT Null SELECT arrayEnumerateDense(a32) FROM array_enumerate_fixed_string FORMAT Null DROP TABLE array_enumerate_fixed_string