This course will show you how to take stand-alone functions and integrate them into a system that gives you greater flexibility and power. You will learn a methodology for approaching data-maintenance applications and develop an online database-maintenance application using transaction processing and Case Logic to control the flow of execution.

Topics Include:

	Developing a transaction processing system
	Guidelines for developing an application
	Identifying the transaction actions
	Defining how transactions may be applied
	Calculating transaction values from other sources and    using these new values to modify a database
	Applying Case Logic methodology to process a transaction
	Developing cases
	Controlling the execution of cases
	Verifying transaction data
	Validating transaction data
	Testing if a field value exists in another file
	Retrieving a field value from a cross-referenced file
	Using PF keys to control the executing of cases
	Enhancing user interaction
	Looping through an existing segment chain
	Branching to a case and returning to the calling case
	Logging transactions and errors
	Tracing execution

Course 103