plsql prompt record is locked by another user

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1. Development environment

plsql
oracle

Two, error

Prompt record locked by another user

3. Solutions

1. Find out the sid, serial# of the database, so that it can be killed later:

select t2.username,t2.sid,t2.serial#,t2.logon_time from v$locke{d}_{o}bjectt1,v$session t2 where t1.session_id=t2.sid order by t2.logon_time;

2. Finally kill the session:
alter system kill session '11278,123'