Gustavo du Mortier is a Functional and Data Analyst at MasterSoft, an Argentinean software company specializing in ERP and healthcare solutions. He previously served as Editor in Chief at a leading Argentinean computing magazine. Gus has written many books and articles on different aspects of programming and databases. Being a father of two sons, he spends his spare time helping them build and enhance their gaming computers and he also enjoys playing his guitar for entertainment and person gratification.