mysql如何让一个用户同时管理多个数据库

mysql 创建一个用户 hail，密码 hail，指定一个数据库 haildb 给 hail
mysql -u root -p
password
use mysql;
insert into user(host,user,password) values('localhost','hail',password('hail'));
flush privileges;
create database haildb;
grant all privileges on haildb.* to hail@localhost identified by 'hail';
flush privileges;
如果想指定部分权限给用户
grant select,update on haildb.* to hail@localhost identified by 'hail';
flush privileges;
删除用户
delete from user where user='hail' and host='localhost';
flush privileges;
删除用户数据库
drop database haildb;
修改指定用户密码
update user set password=password('new_password') where user='hail' and host='localhost';
flush privileges;