新建Oracle DB Link

Oracle DB Link进行跨数据库连接操作。格式如下：
CREATE  PUBLIC  DATABASE  LINK  [link名称]  CONNECT TO  [数据库登录名称]  IDENTIFIED BY ["数据库登录密码"]
USING '(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521)))(CONNECT_DATA =(SERVICE_NAME = 服务名称)))';


注：密码需要双引号包起来，USING中为字符串需要用单引号包起来。

insert into test(id,title) select id,title from test@TestLink;

CREATE  PUBLIC  DATABASE  LINK  "TestLink"  CONNECT TO  test IDENTIFIED BY "xxxxx"
USING '(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521)))(CONNECT_DATA =(SERVICE_NAME = test)))';


跨数据库建表：
create table test_1 as select * from test_1@Oracle Link名称;