5 Jan 2023 Nicole Darnley UNION and UNION ALL in SQL: What They Do and How They’re Different In this article, we’ll explore the SQL clauses UNION and UNION ALL. Learn what they do and when to use each one. I had been an analyst for probably four years before I knew about the SQL clause UNION ALL. I used UNION on a regular basis, but had never heard of its counterpart. Then one day when I heard a coworker talking about it. I thought to myself, “What is he talking about? Read more 20 Dec 2022 Nicole Darnley How to Use WHERE with GROUP BY in SQL In this article, we’ll discuss how to combine the WHERE and GROUP BY clauses in SQL If you’re writing SQL on a daily basis, you will quickly realize how often both WHERE and GROUP BY clauses are used. WHERE is an essential part of most queries. It allows you to filter large datasets to only the pieces you are interested in. GROUP BY is one of the most powerful tools an analyst has when aggregating data. Read more