DROP TABLE IF EXISTS sometable; CREATE TABLE sometable ( date Date, time Int64, value UInt64 ) ENGINE=MergeTree() ORDER BY time; INSERT INTO sometable (date, time, value) VALUES ('2019-11-08', 1573185600, 100); SELECT COUNT() from sometable; INSERT INTO sometable (date, time, value, time) VALUES ('2019-11-08', 1573185600, 100, 1573185600); -- {serverError 15} DROP TABLE IF EXISTS sometable;