查询数据库表被哪个进程锁定的语句
查询数据库表被哪个进程锁定的语句，以'PTL_PARAMETER'为例，查看'PTL_PARAMETER'表被哪些用户锁定了：

SELECT A.OWNER,A.OBJECT_NAME,B.XIDUSN,B.XIDSLOT,B.XIDSQN,B.SESSION_ID,B.ORACLE_USERNAME, B.OS_USER_NAME,B.PROCESS, B.LOCKED_MODE, C.MACHINE,C.STATUS,C.SERVER,C.SID,C.SERIAL#,C.PROGRAMFROM ALL_OBJECTS A,V$LOCKED_OBJECT B,SYS.GV_$SESSION C WHERE ( A.OBJECT_ID = B.OBJECT_ID )AND (B.PROCESS = C.PROCESS )and A.Object_Name = 'PTL_PARAMETER'ORDER BY 1,2