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MySQL is a popular database management system used for web and server applications. However, MySQL is no longer in CentOS’s repositories and MariaDB has become the default database system offered. Mari

转自 http://chen3888015.blog.51cto.com/2693016/986841mysql> update user set host = '%' where user = 'root';ERROR 1062 (23000): Duplicate entry '%-root' for key 1mysql> select host,user from us