A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...

Understand the caching mechanisms for the popular distributed SQL engine and how to use them to improve query speed and efficiency. Presto is a popular, open source, distributed SQL engine that ...

SQL Server performance is slow. Users are complaining. Your boss wants to know what's going on and what you can do to improve SQL Server performance. Where do you start? Which SQL Server query should ...