ORA-01940: cannot drop a user that is currently connected

问题提出：

SQL〉DROP USER USER1 CASCADE

ERROR：ORA-01940: cannot drop a user that is currently connected

因为当前用户正链接到数据库，因此没法删除

 

解决办法：

一、查询此用户的会话进程，

SQL〉SELECT SID,SERIAL# FROM V$SESSION WHERE USERNAME='USER1';

       SID    SERIAL#
---------- ----------
        24      25341

 

二、结束此用户的全部会话

SQL>ALTER SYSTEM KILL SESSION '24,25341';

System altered.

 

三、删除用户

SQL〉DROP USER USER1 CASCADE；