The actions that a database may perform are:
- Conduct a query.
- Analyze data to make better decisions.
- Create data entry forms.
- Validate the data entered and check for inconsistencies.
- Update information in more than one place at the same time.
- Sort and manipulate the data in the database.
The actions "Find the average of four numbers" and "Write a business letter" are not typically actions performed by a database.