MySQL permission management and backup

User management

Create user ：create user user name identified by ' password '
Change Password （ The current user ）：set password = password('12345')
Change Password （ Designated user ）：set password for wanaei=password('111111')
rename ：rename user wanaei to wanaeiHa

-- User authorization all privileges  All permissions , library , surface 
--all privilages  In addition to empowering others , Everything else can 
grant all privileges on *.* to wanaei

-- Query authority 
show grants for wanaei -- View the permissions for the specified user 
show grants for root@localhost

--root  User permissions ：grant all privileges on *.* to 'root'@'locaohost' with grant option
-- Revoke authority  revoke  What authority , In which library , To whom 
revoke all privileges on *.* from wanaei

-- Delete user 
drop user wanaei

MySQL Backup

Ensure that important data is not lost
Data transfer

Backup ：

1. Copy out physical files directly
2. stay Sqlyog Manually export... In this visualization tool
3. Use the command line to export mysqlbump Command line

 mysqldump -hlocalhost -uroot -proot db student >F:a.sql

Import ：
Command line （ Log on first ：mysql -uroot -proot）

- use shool
- source F:/a.sql

Prevent data loss