The following shows an example report generated by this tool. It gives the numbers of rows, columns, bytes as well as human-friendly size counts for each table within a given PostgreSQL database.
Make sure you can access a PostgreSQL database on your machine. Here I'm creating an 'intel' database for the 'mark' user on my Ubuntu 20 machine.
I'll import one of the datasets within fivethirtyeight's repo. Note, because the dates within this dataset are not formatted in YYYY-MM-DD format, I needed to override the format so that the MM/DD/YYYY format would be read properly.