1 format TabSeparatedWithNames CustomSeparatedWithNames CSVWithNames JSONEachRow JSONCompactEachRowWithNames TSKV Avro ORC Parquet Arrow Native CREATE TABLE IF NOT EXISTS table_{format} ENGINE = File({format}) AS test.hits INSERT INTO table_{format} SELECT * FROM test.hits LIMIT 100000 SELECT WatchID FROM table_{format} FORMAT Null DROP TABLE IF EXISTS table_{format}