mysql grant usage_为什么只有grant usage权限却可以增删改查
用dbuser在192.168.0.1上登录远程数据库：show grants;显示GRANT USAGE ON *.* TO 'dbuser'@'192.168.0.1' IDENTIFIED BY PASSWORD '*FE63xxxxxxxxxxxxx1C16A' 仅此一条，dbuser这个用户只有usage权限，查了下mysql manual，mysql usage权限就是空权限，默认cr...
