mysqld —skip-grant-tables
    mysqlcheck —auto-repair —database 数据库 -o -uroot -p123456
    mysqlcheck —auto-repair -A -o -uroot -p123456
    flush privileges;

    create user ‘root’@’%’ identified by ‘123456’;
    GRANT ALL PRIVILEGES ON . TO ‘root’@’%’ IDENTIFIED BY ‘’ WITH GRANT OPTION;