linux 后台任务以及查看查看文件夹大小命令

create database link ylcp3

connect to ylcp3 identified by ylcp3

using '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.6.222)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = ylcp3)

)

)';

select * from ylcp3.ica1@ylcp3;

创建时连接的用户必须是要连接的数据库的用户名和密码

使用时【用户名】.【表名】@【链路名】

create synonym table1 for user1.table1;