DBA入职指南学习笔记2

创建用户
     create user ecology identified by nskfoa;
2、用户授权
     grant connect to ecology;  连接权限
3、授权表权限
     grant select on emp to ecology;
4、收回权限
     revoke select on emp from ecology;
5、删除用户
     drop user ecology;
     drop user ecology cascade;(删除关联的表)
6、权限和角色
     权限是操作的权限，角色是权限的集合。
7、grant connect,resource to ecology;