Query writing is an art. When a painter starts on the canvas he has a clear understanding of what he is going to draw on the empty canvas; he can’t just start with something and change his mind in the middle of the drawing. Imagine Leonardo da Vinci drawing Mona Lisa and half way in-between he changes his mind and starts drawing Medusa.
Data volumes are on the continuous rise and the size of the data warehouse has been increasing more than ever. In such a scenario, writing queries efficiently has become even more important. For a developer or a data scientist, using SQL still remains a very powerful method of analyzing data and building reports and trends.