--建新用户ocs,密码ocs
create user  ocs  identified by ocs;
--查看密码
select * from SYSTEM_.SYS_USERS_;
--改用户密码
alter  user ocs  identified by ocs;
--删除用户test
drop user test  cascade;
--授权
grant user test  XXX;
--查询所有用户的权限
select a.user_id,a.user_name,c.priv_name from system_.sys_users_  a 
left join system_.sys_grant_system_  b on a.user_id=b.grantee_id 
left join system_.sys_privileges_  c on b.priv_id = c.priv_id;
默认的用户权限,一般不用修改,默认就够用了
CREATE_PROCEDURE                          
CREATE_SEQUENCE                           
CREATE_SESSION                            
CREATE_TABLE                              
CREATE_VIEW                               
CREATE_TRIGGER                            
CREATE_SYNONYM
原文:https://www.cnblogs.com/flash100/p/13999252.html