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drop a user that is currently connected

SQL 
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SQL〉DROP USER USER1 CASCADE

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

由于当前用户正连接到数据库,所以无法删除

解决办法:

1、查询此用户的会话进程,

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

       SID    SERIAL#
---------- ----------
        24      25341
        86      18117

2、结束此用户的所有会话

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

System altered.

SQL>ALTER SYSTEM KILL SESSION '86,18117';

System altered.

3、删除用户

SQL〉DROP USER USER1 CASCADE;

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