将具有数据的表从一个MySQL服务器复制到另一个 [英] Copy a table with data from one MySQL server to another

问题描述

我在计算机上有一个MySQL DB，在不同的服务器上有相同的MySQL DB。我需要他们在结构和包含的数据完全相同我已经到了这样的点，我可以做的是，通过截断一个表，然后插入到其他所有的行（完全是相同）表。

I have a MySQL DB on a computer, and the same MySQL DB on a different server. I need them to be exactly the same in term of structure and contained data and I've come to the point where the only way I can do that is by truncating one table and then inserting into it all the rows of the other (exactly the same) table.

我想通过MySQL查询而不是通过备份然后导入它，而不是通过数据库迁移等，而是通过查询，因为我计划使用这个查询在一个VB项目中，并且每当两个表中的任何一个发生变化时使用它。

I want this to happen through a MySQL query and not by making backups and then importing it, not by database migrations or such, but by a query, because I plan using this query in a VB project and use it whenever there is a change in any of the two tables.

我知道如果表在同一个服务器上的查询将如下：

I know that if the tables where on the same server the query would have been as follows:

INSERT INTO db.table1 SELECT * FROM db.table2

不知道如何写 SELECT 子句，以及如何告诉它.table2在另一个服务器上。

But I don't know how to write the SELECT clause and how to tell it that .table2 is on another server.

我认为应该是这样的

INSERT INTO db.table1 SELECT * FROM (ServerName/IP).db.table2

但是我自己不能想出任何想法？

But can't quite figure it out by myself, any ideas?

推荐答案

您可以设置联合表，它基本上将一个服务器上的表链接到另一个服务器上的表。然后使用联合来进行数据传输。

You can setup federated tables, which is basically linking a table on one server to a table on another. Then use the federation to do your data transfers.

首先，您必须在远程服务器上有一个表，一个FEDERATED表。假设远程表在联合数据库中，并且定义如下：

First, you must have a table on the remote server that you want to access by using a FEDERATED table. Suppose that the remote table is in the federated database and is defined like this:

CREATE TABLE test_table (
    id     INT(20) NOT NULL AUTO_INCREMENT,
    name   VARCHAR(32) NOT NULL DEFAULT '',
    other  INT(20) NOT NULL DEFAULT '0',
    PRIMARY KEY  (id),
    INDEX name (name),
    INDEX other_key (other)
)
ENGINE=MyISAM
DEFAULT CHARSET=latin1;

接下来，在本地服务器上创建一个FEDERATED表，表：

Next, create a FEDERATED table on the local server for accessing the remote table:

CREATE TABLE federated_table (
    id     INT(20) NOT NULL AUTO_INCREMENT,
    name   VARCHAR(32) NOT NULL DEFAULT '',
    other  INT(20) NOT NULL DEFAULT '0',
    PRIMARY KEY  (id),
    INDEX name (name),
    INDEX other_key (other)
)
ENGINE=FEDERATED
DEFAULT CHARSET=latin1
CONNECTION='mysql://fed_user@remote_host:9306/federated/test_table';

然后你可以像任何其他表一样查询它。

Then you can query it like any other table.

但是，您应该阅读的限制约，包括以纯文本存储的远程密码。如果这是一个临时设置，只是一次关闭副本，并且服务器不可用于公众，你已经尽量减少了与其相关的大部分风险。

There are however a decent number of limitations you should read about including the remote password being stored in plain text. If this was a temporary setup purely for a once off copy, and the server isn't available to the public you have already minimised most of the risk associated with it though.

这篇关于将具有数据的表从一个MySQL服务器复制到另一个的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！