--查看全部用戶
SELECT OWNER,OBJECT_NAME FROM DBA_OBJECTS WHERE OBJECT_TYPE='DATABASE LINK';
--查看全部用戶
SELECT * FROM DBA_DB_LINKS;
--查看本用戶
SELECT * FROM USER_DB_LINKS;

給scoot用戶權限
GRANT CREATE PUBLIC DATABASE LINK,
CREATE DATABASE LINK TO scoot;

--  (connection為dblink名字,scott為數據庫用戶名,tiger為用戶名密碼,引號內容為遠程數據庫下tnsnames.ora文件內容)
create database link connection
    connect to scott identified by "tiger"
    using '(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.52)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )
';

SELECT * FROM  DEPT@connection;

drop database link connection;

select d.* from dba_dependencies d where d.referenced_link_name='XXX'