I'm surprised that some sees this as a sort of contest. He presented data using SQL. In this regard only queried data, in this case Nigeria, would be the data that would be out for analysis. No data presentation is perfectly accurate, unless in rare circumstances. Even in blockchain, you may query a data of the biggest SP holders, as soon as you finished query, one whale may decide to buy 20,000,000 SP rendering whatever results you have inaccurate.