MySQL报错：Table 'performance_schema.session_variables' doesn't exist

解决方法：

1:UPGRADE MySQL

mysql_upgrade -u root -p --force

2:重新启动MySQL

net stop mysql

net start mysql

3:重置密码

mysqld --defaults-file="../my.ini" --skip-grant-tables

update mysql.user set authentication_string=password('admin') where user='root' and Host = 'localhost';

mysqladmin shutdown -uroot -p