select 1;-- comment after statement select 1;# comment after statement select /* inline comment */ 1; select /*! 1 + */ 1; select /*!300000 1 + */ 1; select /*!300000 1 + */ 1; SELECT 2 /* +1 */; SELECT 1 /*! +1 */; SELECT 1 /*!50101 +1 */; SELECT 2 /*M! +1 */; SELECT 2 /*M!50101 +1 */;