SQL is a powerful tool in retrieving and updating data. The data used is from the sub county population density. I have run the codes on the data retrieved the necessary output as per the questions provided. The document is in PDF format and the codes are in SQL format. In the document, SQL is used sort data in order of sub counties with the highest female population. It has also been used to get the total population of each sub county and the average population density of the sub counties. In this data, SQL has been used to retrieve rows and update typing mistakes.