Peter Gulutzan and Trudy Pelzer are the principals of Ocelot Computer Services Inc. in Alberta, Canada. Peter and Trudy are technical writers and computer programmers who have worked with SQL since 1986. They have written three other books, Optimizing SQL (CMP Books, 1994), Optimizing C with Assembly Code (CMP Books, 1995), and SQL-99 Complete, Really (CMP Books, 1999).