Heli Helskyaho is the CEO for Miracle Finland Oy and an Ambassador for EOUC (EMEA Oracle Users Group Community). In 2015, and again in 2016, Heli was nominated as one of the top 100 influences on IT sector in Finland. Heli holds a Master’s degree (Computer Science) in Helsinki University and she is specialized on databases. At the moment she is working on her doctoral studies on schema discovery and big data. Heli has been working on IT since 1990 and with Oracle products since 1993. She has been in several positions but every role has always included database design. Heli believes that good database design and good documentation reduces performance problems and makes solving them easier. Heli is also an Oracle ACE Director and a frequent speaker in many conferences. She is the author of Oracle SQL Developer Data Modeler for Database Design Mastery (Oracle Press 2015), co-author of Real World SQL and PL/SQL: Advice from the Experts (Oracle Press 2016) and one of the first winners of Oracle Database Developer Choice Award, Devvy, on Database Design category in 2015.