實現兩個數據庫的操作dblink

創建一個dblink

     create database link [LINKNAME] connect to [USERNAME(沒有引號)]

          identified by [PASSWORD(沒有引號)] using 

          'TNS'

     sample:

     create database link linkexam connect to APPS

          identified by APPS_DEV using

          '(DESCRIPTION = (ADDRESS = ( PROTOCOL = TCP) (HOST = 114.251.247.78)(PROT = 11101))

          (CONNECT_DATA = (SID = DEV)))'

     刪除一個dblink

     drop database link [LINKNAME]

     sample:

     drop database link linkexam

     使用一個dblink

          select * from [TABLENAME]@[LINKNAME]

          sample:

          select * from hr_user@linkexam

     查看所有dblink

          select * from all_db_links