Michael McLaughlin, Oracle ACE (Rexburg, ID) is a professor at BYU – Idaho in the Computer Information Technology Department of the Business and Communications School. He is the author of Oracle Database 12c PL/SQL Programming, MySQL Workbench, and several other Oracle Press books.John Harper (Lehi, UT) is a principal database engineer for the Church of Jesus Christ of Latter-day Saints and the co-author, with Michael McLaughlin, of Oracle Database 11g PL/SQL Programming Workbook.