The widespread of using bar codes for most commercial products increased the capabilities of both generating and collecting data. The computerization of business management, government administration, scientific and engineering data management has led to the growth of powerful databases in which analysis is important. For this purpose, data mining emerged aiming to transform the processed data into useful information and knowledge. Data mining is defined as the process of extracting hidden, previously unknown, and potentially useful information from data. The idea is to build machine learning algorithms that sift through databases automatically in order to discover regularities or patterns.