使用查询将数据从一个db的表复制到另一个db的表中（两个表具有相同的结构）

Question

I have two database in the same schema. My db is in Postgres. I want to copy data of any table (ie product) of my 1st db into the same table of the 2nd db.

Is it possible to do so using query?

Answer 1

不能作为单个SQL命令（至少没有没有dblink），但最简单的方法可能是在两个psql之间使用管道 - 两端使用COPY，一个以CSV格式发送数据另一个收到它。

Answer 2

尝试

insert into db1.table1 select * from db2.table2

Answer 3

It's not possible in vanilla PostgreSQL installation.

If you are able to install contrib modules, use dblink :

INSERT
INTO    product
SELECT  *
FROM    dblink
        (
        'dbname=sourcedb',
        '
        SELECT  *
        FROM    product
        '
        ) AS p (id INT, column1 INT, column2 TEXT, …)

This should be run in the target database.