Welcome to the second testsite.. ;-)

This is a demonstration of how you can have multiple websites running on the same database in Typo3.

Advantages

Easy management of many websites from the same administration interface
Quick site configuration - no need for copying files around and creating new databases.
Reuse templates and even content throughout various sites!

Disadvantages

The sites are (currently) very hard to move to another Typo3-database when integrated with other sites.
All uploaded files are accessible from all virtual hosts using the same database and therefore also the same directories.

When to use this feature?

You should use this feature when you have a lot of sites that are somehow related to each other and therefore benefit from being maintained in the same interface.

An example is www.typo3.com and www.typo3.dk. They are in the same database and that makes it easy to maintain both sites at once and copy stuff from one site to another.

ISP's might also use this feature for low-priority sites with few pages.

How do you create more sites in one database?

Like shown below on the image. As you see this is a screendump of the records on the startpage of this "Another site".

 

The template-record is responsible for creating the "new site". Notice that "rootlevel" is checked in the template. This ensures that the template make the page the base of the new site.

 

The Domain-record is responsible for directing hits from the URL "www.domain.org" to this site and not the default site ("Startpage") in the database.