NOWAIT

SELECT SESSION_ID FROM V$LOCKED_OBJECT,USER_OBJECTS WHERE V$LOCKED_OBJECT.OBJECT_ID = USER_OBJECTS.OBJECT_ID SELECT SERIAL# FROM V$SESSION WHERE SID=' ......

``` 1.通过此语句查询正在锁定的SESSION_ID: SELECT distinct SESSION_ID FROM V$LOCKED_OBJECT,USER_OBJECTS WHERE V$LOCKED_OBJECT.OBJECT_ID = USER_OBJECTS.OBJECT_ID 2. ......

1、查看数据库内产生了哪些锁 select t2.username,t2.sid,t2.serial#,t2.logon_time from v$locked_object t1,v$session t2 where t1.session_id=t2.sid order by t2.logon_ti ......