oracle创建一个只读账号Oracle Lock

SELECT A.OWNER,
       A.OBJECT_NAME,
       B.XIDUSN,
       B.XIDSLOT,
       B.XIDSQN,
       B.SESSION_ID,
       B.ORACLE_USERNAME,
       B.OS_USER_NAME,
       B.PROCEoracle账号SS,
       B.LOCKED_MODE,
       C.MACHINE,
       C.STATUS,
       C.SERVER,
       C.SID,
       C.SERIAL#,
       C.PROGRAM
  FROM ALL_OBJECTS A, V$LOCKED_OBJECT B, SYS.GV_$SESSION C
WHERE (A.OBJECT_ID = B.OBJECT_ID)
   AND (B.PROCESS = C.PROCESS)
ORDER BY 1, 2;

alter system kill session 139, 268;
alter system kill session 199, 1445;
alter system kill session sid, serial#