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Does the WordPress installation has to use an exclusive database? I'm building a website with custom pages, that access a MySQL database. But the site will also have a WordPress installation. Can I use the same database unique for WordPress and the custom pages?

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Does the WordPress installation has to use an exclusive database?

If there are no table name conflicts, WordPress can share a database. Preventing conflicts is just a matter of setting a database prefix on install. By default, that prefix is wp_ but you can change it to anything you want within reasonable character limits. It should be no problem.

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Yes.
Any custom site can be built within a WordPress installation, as it's back-end is completely coded with PHP, and MySQL. But for many reasons you are not recommended to use MySQL queries in WordPress, but to use $wpdb class refrerence. And you can make as many as pages you need by using WordPress custom Page Templates.

You can create a page template by simply putting the following codes into a new .php file:

<?php
/*
Template Name: My Custom Page
*/

Then you can create a new page in WordPress admin panel and can choose the template easily. And this Q & A will also help you achieve something you may want.

Even you can make new tables within your WordPress db, and can add/edit/delete/query certain things from the new custom tables. But for always, using $wpdb is recommended for many reasons(you know now).

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  • Thanks for your valuable information. I'm not building the custom part as custom WP pages, but now after this answer I'll be considering doing it, since I didn't know much about these capabilities. Thanks a lot for clarifying. – wid Aug 24 '13 at 16:21

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