創建db_link
-- Create database link
create public database link dblinkName
connect to 數據庫賬號 identified by 數據庫密碼
using '(DESCRIPTION =(ADDRESS_LIST =(ADDRESS =(PROTOCOL = TCP)(HOST = 數據庫ip)(PORT = 數據庫端口)))(CONNECT_DATA =(SERVICE_NAME = 數據庫服務名)))';
數據庫服務名查詢
select name from v$database ;
刪除db_link
drop public database link DB_HITMOOC;
使用db_link
select * from tablename@dblinkName --(只有查詢)
select t.*, t.rowid from tablename@dblinkName t --(可以修改,立即生效)