1 CREATE TABLE optimized_select_final (t DateTime, x Int32, s String) ENGINE = ReplacingMergeTree() PARTITION BY toYYYYMM(t) ORDER BY x INSERT INTO optimized_select_final SELECT toDate('2020-01-01'), number, 'string' FROM numbers(50000000) OPTIMIZE TABLE optimized_select_final FINAL SELECT * FROM optimized_select_final FINAL where s = 'string' FORMAT Null DROP TABLE IF EXISTS optimized_select_final