oracle中dblink查看，创建，使用，删除

一.查看dblink

--（1）查看全部用户
SELECT OWNER,OBJECT_NAME FROM DBA_OBJECTS WHERE OBJECT_TYPE='DATABASE LINK';

--（2）查看全部用户
SELECT * FROM DBA_DB_LINKS;

--查看本用户
SELECT * FROM USER_DB_LINKS;

二.创建dblink
1.如果没有权限的话给权限(有权限的话省略)

给scoot用户权限
GRANT CREATE PUBLIC DATABASE LINK,
CREATE DATABASE LINK TO scoot;

2.创建dblink

--  (connection为dblink名字,scott为数据库用户名,tiger为用户名密码,引号内容为远程数据库下tnsnames.ora文件内容)
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)
    )
  )
';

3.使用dblink

SELECT * FROM  DEPT@connection;

三.删除dblink

drop database link connection;

四. 注意

dblink不能进行DDL操作！！！