我如何才能同时访问两个不同的数据库,我的意思是可以实现从database1进行搜索并将例如ID或其他信息保存到database2吗?
If you have a user account that can access both databases, just prefix the database name:
SELECT database1.table1, database2.table2.....
as far as I know, you can even do JOINs, although I don't know about possible performance implications.
If you do not have a mySQL account that can access both databases, it's not possible.
Yes. PHP has a few MySQL extensions. However, if you're just getting started, look at the MySQL functions for this. Specifically mysql_connect()
and mysql_select_db()
could be used to create separate connections to different databases or switch between them on the same connection.
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