1. A data comparison system for comparing data stored within a database against each other to determine at least one of duplicate, fraudulent, defective and irregular data, said data comparison system comprising: a database storing data therein; a pattern database storing pattern data therein; a data pattern build system, responsively connected to said database and to said pattern database, retrieving the data from said database and generating the pattern data formatted in accordance a predetermined patten, the predetermined pattern comprising an array having array locations corresponding to each character in a defined character set, said data pattern build system incrementing a value in each of the array locations responsive to the number of occurrences of each character in the data and storing the array as the pattern data in said pattern database; and a neural network, responsively connected to said pattern database, retrieving the pattern data stored therein and comparing the pattern data to each other and determining responsive to the comparing when different pattern data match in accordance with predetermined criteria indicating that the different pattern data are at least one of duplicate, fraudulent, defective and irregular.