Dr. Michael Blaha is a consultant and trainer who specializes in conceiving, architecting, modeling, designing, and tuning databases. He has worked with dozens of organizations around the world. Blaha has authored seven U.S. patents, seven books, many articles, and two video courses. He received his Ph.D. from Washington University in St. Louis, and is an alumnus of GE Global Research in Schenectady, New York. More information can be found on Blaha's website Super Data Guy.
Identification of data sources is the first step in warehouse development. In this video training segment, Michael Blaha provides a framework by reviewing data modeling constructs and terminology, including dependent and independent entity types. Using IE (information engineering) notation and the ERwin tool, Blaha walks through a sample operational data model.