Do we have high taxes in Poland?

Recently, a lot is heard about some additional fees that our government in Poland wants to introduce. This, combined with a discussion among my friends about, among others, income tax threshold, prompted me to check how high the tax burden for employees in Poland and Europe is. I have included everything in one Excel and I hope that you will help me improve it.
I have chosen arbitrarily a few countries from Europe: the Czech Republic, Germany, Sweden and the UK. These are the countries, to which many people migrate and often seen as countries with a higher standard of living, as compared to Poland.

Accumulating lists in Power Query using… List.Acculumate()

List.Accumulate is a very powerful function that is often overlooked, when doing Power Query transformations. Its basic behaviour is explained in the reference. How this function works is accumulates a result from a specified operation (accumulator function) starting from the initial value – seed – and going row by row till the end of a specified list. Radacad greatly explained the possibilities of the function. I treat List.Accumulate as a function that lets me access a previous row. Something that is very often expected by customers using Excel sheets as data sources. This enables me to e.g. detect a change in ID or date – from my experience 90% of the cases.

Authenticating to a datasource with multiple credentials

The case from one of my previous comments had another catch! As I mentioned the client was downloading data from an API. The client was interested in data for multiple entities i.e. had to use different credentials for the same URL to retrieve different datasets. Because the client wanted to see everything in one Power BI I had to find a suitable solution. Same as before, I turned my attention towards M language!

Flights during a storm

This vizualization took way more time than I expected. The idea came up on 29th June, when I was sitting in Microsoft’s office right next to the airport in Warsaw. The storm during that afternoon was huge. I immediately checked flightradar24 to see, what the airtraffic looks like. I wondered what it would look like if plotted with the clouds and maps.