oracle查询会话锁并解锁

session 1:
C:/>sqlplus scott/tiger

SQL> select * from t;

A B C
---------- -------------------- --------------------
111 aa bb
222 hello world

SQL> update t set b='hi' where a=222;

已更新 1 行。

session 2:
C:/>sqlplus hxg/hxg

SQL> select * from scott.t;

A B C
---------- -------------------- --------------------
111 aa bb
222 hello world

SQL> update scott.t set b='good' where a=222;
挂起等待。。。。

another session 2（session 22）:
C:/>sqlplus hxg/hxg

SQL> select s.sid,s.SERIAL#,s.machine,o.object_name,l.oracle_username,l.locked_mode
2 from v$locked_object l,v$session s,all_objects o
3 where l.session_id=s.sid and l.object_id=o.object_id ;

SID SERIAL#
---------- ----------
MACHINE
----------------------------------------------------------------
OBJECT_NAME ORACLE_USERNAME LOCKED_MODE
------------------------------ ------------------------------ -----------
148 2
MSHOME/TECH037
T HXG 3

150 2
MSHOME/TECH037
T SCOTT 3

SQL> alter system kill session '150,2';

系统已更改。

此时：session 2:
SQL> update scott.t set b='good' where a=222;

已更新 1 行。

SQL>