The activity database makes it possible to store data of any kind structured (table-like) in the Moodle course room. On the one hand, you can provide content for students while on the other hand, allowing them to write their own database entries. This activity is a learning activity that has nothing to do with common SQL or Postgres databases.
In the following video we will explain step by step how to create and configure a database.
You can find detailed information about the activity database here.