DROP TABLE IF EXISTS test.json; CREATE TABLE test.json (x Enum8('browser' = 1, 'mobile' = 2), y String) ENGINE = Memory; INSERT INTO test.json (y) VALUES ('Hello'); SELECT * FROM test.json ORDER BY y; INSERT INTO test.json (y) FORMAT JSONEachRow {"y": "World 1"}; SELECT * FROM test.json ORDER BY y; INSERT INTO test.json (x, y) FORMAT JSONEachRow {"y": "World 2"}; SELECT * FROM test.json ORDER BY y; DROP TABLE test.json;