Learn how to use data flow diagrams (DFDs) to analyze and design business systems. Discover the benefits, components, and types of DFDs, and how to apply them in your projects.

Learn what a data flow diagram is, what are its main elements and symbols, and how it can help you with data modeling in data analytics.

The flow chart shown overleaf illustrates the use of the Database Interface routines. Routine DIERR is not included in the diagram. It may generally be used out of sequence within the guidelines ...