Marek Maśko – works as a Principal Database Analyst at Sabre Polska where he develops a database system for Flight Plan Manager application. He supports teams of developers, testers, delivery, and technical support staff in this large international project. Fan of query optimization and exploration of knowledge about SQL Server Internals. He professionally works on databases and in particular with SQL Server since 2010. Earlier, a Java and C# coder. An active member of the Krakow chapter of the Polish Data Community. Marek is MCTS: SQL Server 2008 and MCSA: SQL Server 2012/2014 certified.