ORA-00054: 资源正忙, 但指定以 NOWAIT 方式获取资源, 或者超时失效---解决方法
select session_id from v$locked_object;
SELECT sid, serial#, username, osuser FROM v$session where sid = 21;
alter system kill session '21,27874';
alter system kill session '73,6069';
select session_id from v$locked_object;
SELECT sid, serial#, username, osuser FROM v$session where sid = 21;
alter system kill session '21,27874';
alter system kill session '73,6069';