5604 unpack option myisamchk, 570 unqualified option ndb_desc, 4307 ndb_show_tables, 4418 unsafe statement (replication) defined, 3590 unsafe statements (replication), 3591 UNSIGNED, 2012, 2018 UNTIL, 2802 updatable views, 4747 updatable_views_with_limit system variable, 913 UPDATE, 80, 2702 update thread state, 1852 update option MySQLInstallerConsole, 142 ndb_index_stat, 4343 UPDATE privilege, 1195 update-state option myisamchk, 569 UpdateXML(), 2251 Updating thread state, 1852 updating main table thread state, 1852 updating reference tables thread state, 1852 upgrade option mysqld, 758 MySQLInstallerConsole, 142 upgrade-system-tables option mysql_upgrade, 413 upgrades NDB Cluster, 4003, 4476 upgrades and downgrades (NDB Cluster) compatibility between versions, 4003 upgrading, 261 a Docker installation of MySQL, 295 different architecture, 297 new features, 9 with MySQL SLES Repository, 293, 293 with MySQL Yum Repository, 291 upgrading MySQL, 404 UPPER(), 2184 uptime, 451 Uptime status variable, 970 Uptime_since_flush_status status variable, 970 URI-like connection string, 367 URLs for downloading MySQL, 97 usage option ndbd, 4247 ndbinfo_select_all, 4254 ndbxfrm, 4438