mysql>grant all privileges on test.* to 'root'@'%';mysql>grant all privileges on *.* to 'root'@'%';mysql>grant all privileges on *.* to 'liuhui'@'%';mysql>grant all privileges on *.* to 'liuhui'@'%' IDENTIFIED BY 'liuhui';mysql>grant all privileges on *.* to 'liuhui'@'10.1.1.1';mysql>show variables like 'validate_password%';