You can get “ORA-01940: cannot drop a user that is currently connected” error during the drop any user.
Details of error are as follows.
SQL>drop user MSD cascade; drop user username cascade * ERROR at line 1:ORA-01940: cannot drop a user that is currently connected
To solve this problem, you need to lock related user firstly.
SQL> alter USER MSD account lock; User altered.
Then kill the session of related user as follows.
SQL> select s.sid, s.serial#, s.status, p.spid from gv$session s, gv$process p where s.username = 'MSD' and p.addr (+) = s.paddr; SID SERIAL# STATUS SPID ——— ———- ——– ———— 163 34 INACTIVE 342463 634 63 INACTIVE 153783
Kill these sessions as follows.
SQL> alter system kill session '163,263,@1'; System altered. SQL> alter system kill session '634,63,@2'; System altered.
If this sessions are not killed by using kill session command, then use the Kill -9 OS command as follows.
Find the SPID of related session and execute the following command on Operating system.
$ kill -9 SPID
select 'kill -9 ' || P.SPID ,s.sid,S.USERNAME from v$session s ,v$process p where S.PADDR=P.ADDR and S.SID=163; select 'kill -9 ' || P.SPID ,s.sid,S.USERNAME from v$session s ,v$process p where S.PADDR=P.ADDR and S.SID=634; kill -9 15736 kill -9 16842
Execute this command on operating system, session will be killed forcily.
Now you can drop this user ( SCHEMA )
SQL> drop user MSD cascade; User dropped.
Do you want to learn Oracle Database for Beginners, then read the following articles.
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