mysql 权限管理

#给用户cacti赋予所有库的所有权限  
GRANT ALL PRIVILEGES ON *.* TO 'cacti'@'%' IDENTIFIED BY 'cacti' WITH GRANT OPTION;  
#重新载入赋权表  
FLUSH PRIVILEGES;  
  
#收回权限(不包含赋权权限)  
REVOKE ALL PRIVILEGES ON *.* FROM cacti;  
REVOKE ALL PRIVILEGES ON cacti.* FROM cacti;  
#收回赋权权限  
REVOKE GRANT OPTION ON *.* FROM cacti;  
#重新载入赋权表  
FLUSH PRIVILEGES;  

grant select on *.* to 'repl'@'xx.xx.4.%' identified by 'XXXX';