Tomaž Kaštrun is a SQL Server developer and data scientist with more than 15 years of experience in business warehousing, development, ETL, database administration, and query tuning. He holds over 15 years of experience in data analysis, data mining, statistical research, and machine learning. He is a Microsoft SQL Server MVP for the data platform and has been working with Microsoft SQL Server since version 2000. He is a blogger, author of many articles, and a frequent speaker at the community and Microsoft events. He is an avid coffee drinker who is passionate about fixed-gear bikes.