1. A method for building a datastore for storing and retrieving regression testing data for a complex application, said method comprising: creating said datastore for said complex application to manage data for regression testing, wherein said datastore is a database table consisting of a plurality of rows and a plurality of columns residing in a relational database environment; after said creating, receiving a first input data, a first output data, a second input data, and a second output data for said complex application; after said receiving said first input data, said first output data, said second input data, and said second output data, comparing said first input data to said second input data; after said comparing said first input data to said second input data, modifying said first input data, wherein said modifying renders said first input data compliant for a second release of said complex application; after said modifying, sending a first modified first input data to said complex application for regression testing; after said sending said first modified first input data, receiving from said complex application a first modified first output data; after said receiving from said complex application said first modified first output data, comparing said first modified first output data with said second output data; and sending result from said comparing said first modified first output data with said second output data to an application expert.