1.alter user XXX account lock;SELECT * FROM V$SESSION WHERE USERNAME='LGDB';alter system kill session 'xx,xx'drop user xx cascade
2.或者shutdown掉數據庫,再重啓
具體可如下:
(1)查看用戶的連接狀況
select username,sid,serial# from v$session
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如下結果:
username sid serial#
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NETBNEW 513 22974
NETBNEW 514 18183
NETBNEW 516 21573
NETBNEW 531 9
WUZHQ 532 4562
(2)找到要刪除用戶的sid,和serial,並刪除
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如:你要刪除用戶'WUZHQ',可以這樣做:
alter system kill session'532,4562'
(3)刪除用戶
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drop user username cascade
(**)如果在drop 後還提示ORA-01940:無法刪除當前已鏈接的用戶,說明還有連接的session,可以通過查看session的狀態來確定該session是否被kill 了,用如下語句查看:
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select saddr,sid,serial#,paddr,username,status from v$session where username is not null
結果如下(以我的庫爲例):
saddr sid serial# paddr username status
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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 用戶ID account unlock 先解開這個用戶鎖定 2.這個機制是在用戶的profile中設定,profile主要是對系統資源和用戶囗令的管理,你可以打開查看,裏面有個 FAILED_LOGIN_ATTEMPTS 參數,你還可以結合其它的參數一起使用來管理資源和囗令。系統有個默認的profile叫default 給個示例: 1.資源的 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; 然後再創建或修改用戶時指定一個profile如: create user wuser identified by wuser ....... profile luck_prof ;