I downloaded the original dataset from here: https://ourworldindata.org/covid-deaths.
I then created two separate files from this which can be found in the 'datasets' folder. I loaded them into a Microsoft SQL server and ran the queries found in the 'queries' folder.
I repeated the same in Azure Data Studio because it has an integrated Jupyter Notebook and included those files in the 'queries' folder too. Here, I ran into a problem where if I download the files from Azure, then the NULL values are converted to zeros which can mess up the Tableau visualization.
I then loaded the excel files into Tableau and created a dashboard that can be seen here: https://public.tableau.com/app/profile/gombos2167/viz/PortfolioProject_16351937521390/Dashboard1
Or as a picture file:
