Re: join across databases - how to select databases?
| From: | CPT John W. Holmes | Date: | Fri, 22 Aug 2003 15:33:08 +0000 |
| Subject: | Re: join across databases - how to select databases? | ||
| References: | 1 | Groups: | php.db |
| Request: | Send a blank email to php-db+get-30054@lists.php.net to get a copy of this message | ||
From: "Moshe Weitzman" <phpnntp.20.weitzman@spamgourmet.org>
> I have looked all over the web but can't find an example *in php* for
> connecting to a mysql server, selecting database(s), and issueing a query
> which joins across databases. I already know the SQL required to achieve a
> multiple database query. My question is about how many calls to
> mysql_select_db() are required, does order matter, etc.
What have you tried? What does mysql_error() say after each attempt?
I assume something like the following would work, regardless of whether/how
you've called mysql_select_db()
SELECT t1.column FROM database1.table1 t1 JOIN database2.table2 t2 ON t1.id
= t2.id
If you have something working from the MySQL command line, then it's going
to work from mysql_query() with the same exact syntax.
---John Holmes...