Can Textpattern share a database?
Can Textpattern share a MySQL database with another application?
Can two separate Textpattern installs share the one database?
Yes. Set the Database Prefix to something unique when installing Textpattern.
For example, if you’re installing multiple Textpattern sites that share the one database, you might use
txp1 as the Database Prefix for the first site,
txp2 for the second, and so on.