转:oracle中用户删除不了,提示“无法删除当前已连接的用户”

 1.alter user XXX account lock;SELECT * FROM V$SESSION WHERE USERNAME='LGDB';alter system kill session 'xx,xx'drop user xx cascade

2.或者shutdown掉数据库,再重启

具体可如下:

(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

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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

1.你可以用 alter user 用户ID account unlock 先解开这个用户锁定

2.这个机制是在用户的profile中设定,profile主要是对系统资源和用户囗令的管理,你可以打开查看,里面有个 FAILED_LOGIN_ATTEMPTS 参数,你还可以结合其它的参数一起使用来管理资源和囗令。系统有个默认的profile叫default

给个示例:
1.资源的
create profile luck_prof limit
sessions_per_user 8
cpu_per_session 16800
logical_reads_per_session 23688
connect_time 268
idle_time 38;
2.囗令的,如修改 default
alter profile default limit
password_life_time 60
password_grace_time 10
password_reuse_time 1800
failed_login_attempts 3
password_lock_time 1/1440;

然后再创建或修改用户时指定一个profile如:

create user wuser
identified by wuser
.......
profile luck_prof ;

 

posted @ 2012-09-04 16:29  探讨  阅读(18984)  评论(1编辑  收藏  举报