单项选择题 You install a copy of Mysql 5.6.13 on a brand new Linux server by using RPM packages. The server starts successfully as verified by the following commands: $ pidof mysqld 3132 $tail – n2 /var/lib.mysql/hostname.err 2013-08-18 08:18:38 3132 [Note] /usr/sbin/mysqld:ready for connections. Version: 5.6.13-enterprise-commercial-advaced socket:/tmp/mysql.sock port; 3306 Mysql Enterprise Server – Advanced Edition (Commercial) You attempt to log in as the root user with the following command: $mysql – u root ERROR 1045 (28000): Access denied for user root@localhost (using password: NO) Which statement is true about this scenario?（）

多项选择题 What are four capabilities of the mysql client program?（）

多项选择题 Consider the events_% tables in performance Schema. Which two methods will clear or reset the collected events in the tables?（）