改ROOT口令
1.net stop mysql //停MYSQ服务
2.CD 到mysql bin目录下mysqld-nt --skip-grant-tables //启动MYSQL
3.DOS下mysql mysql //登录到mysql库
4.update user set password =PASSWORD("fuck") where user=root
5.FLUSH PRIVILEGES;

建库
1.create database xx;
2.FLUSH PRIVILEGES;

建用户
1.insert into mysql.user(Host,User,Password,ssl_cipher,x509_issuer,x509_subject) values("localhost","username",PASSWORD("password"),,,);
2.grant all privileges on xx.* to username@localhost identified by password
3.FLUSH PRIVILEGES;