can I have one db for multiple wordpress sites but multiple wp codes/installations

I need

• few Wordpress sites for testing purposes.
• It would be great if I can use only one db
• but I nee开发者_开发百科d few wordpress codes/instalations (because I need different settings and plugins for each site.

Can I have all that running on one mySQL db? Would use the same db_name, db_user, db_password, etc… and the only thing I change for the every other blog is the prefix?

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It should be perfectly possible. when you setup wordpress there's a field to specify the table prefix (default is wp_) when setting up the database. These settings are also stored in wp-config.php