• ORA-01940无法删除当前已连接用户


    1)查看用户的连接状况

    select username,sid,serial# from v$session

    ------------------------------------------

    如下结果:

    username          sid                serial#

    ----------------------------------------

    NETBNEW          513              22974
    NETBNEW          514              18183
    NETBNEW          516              21573
    NETBNEW          531              9
    WUZHQ             532              4562

    (2)找到要删除用户的sid,和serial,并删除

    -------------------------------------------

    如:你要删除用户'WUZHQ',可以这样做:

    alter system kill session'532,4562'

    (3)删除用户

    --------------------------------------------

    drop user username cascade

    (**)如果在drop 后还提示ORA-01940:无法删除当前已链接的用户,说明还有连接的session,可以通过查看session的状态来确定该session是否被kill 了,用如下语句查看:

    -------------------------------------

    select saddr,sid,serial#,paddr,username,status from v$session where username is not null

    结果如下(以我的库为例):

     saddr                     sid           serial#            paddr              username              status

    --------------------------------------------------------------------------------------------------------

    564A1E28              513           22974            569638F4        NETBNEW             ACTIVE
    564A30DC              514          18183            569688CC        NETBNEW            INACTIVE
    564A5644              516           21573            56963340        NETBNEW            INACTIVE
    564B6ED0              531           9                   56962D8C        NETBNEW            INACTIVE
    564B8184              532          4562               56A1075C        WUZHQ                KILLED

    status 为要删除用户的session状态,如果还为inactive,说明没有被kill掉,如果状态为killed,说明已kill。

    由此可见,WUZHQ这个用户的session已经被杀死。此时可以安全删除用户。

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  • 原文地址:https://www.cnblogs.com/xinxin1994/p/6290714.html
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