MySQL 5.7 Release Notes
utf8 is an alias for the utf8mb3 character set. For more information, see Section 10.9.2, “The utf8mb3 Character Set (3-Byte UTF-8 Unicode Encoding)”.
utf8 is an alias for the utf8mb3 character set. For more information, see Section 10.9.2, “The utf8mb3 Character Set (3-Byte UTF-8 Unicode Encoding)”.