添加dblink拓展

执行

create extension dblink;

拓展中出现dblink时，表示添加拓展成功。

创建dblink

SELECT dblink_connect('myconn', 'dbname=postgres');

dbname为你要远程操作的数据库的名字。

查询

select * from dblink('mysconn','select * from rm.dp_photo') 
 as T(pdid character varying(25), dptdid character varying(25), version character varying(25), png bytea);

数据批量复制

insert into rmd.dp_photo
select * from dblink('mysconn','select * from rm.dp_photo') 
 as T(pdid character varying(25), dptdid character varying(25), version character varying(25), png bytea);