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
2.1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;

2.2 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(create、truncate、drop、alter)操作！