A Comma Separated Values (CSV) file allows you to exchange data between different applications, such as a Google Sheet an Excel Document. A common use case is turning an Excel Document into a CSV, and then uploading that CSV into a database to create a table.
To import a CSV as a table in your database:
Click SQL Client in the left sidebar
Select Tables in the SQL Client menu
Click the Upload button next to Tables.
Add a default value to columns
Add columns to the table