You can download your project's database as a CSV (comma separated values, i.e. a spreadsheet).
From the home dashboard, where you can view all projects, find the project you want to download data for and then select "Export tables to CSV":
This will send an email to address associated with your Afterpattern account. That email will include CSVs (spreadsheets) of all the tables in your project's database.
You can upload a CSV to any spreadsheet software, including Excel and Google Sheets. From there, you can manipulate your data however you wish.
After you click "Export tables to CSV", you should receive the email within 2-3 minutes. However, if you have a particularly large project database (many tables, each with hundreds or thousands of rows), the email may take up to 30 minutes to arrive.