删除临时表，

删除临时表，

SELECT sid FROM v$lock                                                                                          
WHERE id1 = (SELECT object_id  FROM user_objects                                                                                                                     

WHERE object_name = upper('XXTB'));

SELECT sid, serial#  FROM v$session

 WHERE sid in ('70', '16', '67', '130');

 ALTER system kill session '16,2077';

 ALTER system kill session '67,18474';

select * from dba_db_links;
--drop public database link  DBL_xxx ;


create database link  DBL_ XXX  connect to  XXXidentified by  XXX
using '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = XXX)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = ORCL)))';
  
select * from v_xxx@ XXX;


create public database link DBL_ XXX   connect to  XXXidentified by  XXX
using 'xxxx';