There are many factors that have contributed to the slow but steady rise of the popularity and ubiquity of SQL as a way to work with data. Among all these factors, the most significant one in my opinion is the concept of “what” rather than “how”. The second factor of greatness of SQL for me is the ability to quickly and easily answer questions about data. I choose to start out with these two big ideas that to me, is fundamental to the language. Read More...