管理员登陆语句

账号要加上 as sysdba            例如:sys as sysdba

显示当前用户 SHOW USER;

显示系统拥有哪些用户 SELECT * FROM all_users;

新建用户并授权 CREATE USER USER_NAME IDENTIFIED BY USER_PASSWORD; (默认建在SYSTEM表空间下)

GRANT CONNECT,RESOURCE TO A;(授权)

连接到新用户 conn USER_NAME/ USER_PASSWORD

对普通账号解锁 ALTER USER scott ACCOUNT UNLOCK;

对口令进行修改 ALTER USER soctt IDENTIFIED BY tiger;

查询当前用户下所有的对象 SELECT * FROM tab;

oracle 数据库登陆