A simple definition of data mining is, access among large-scales of data and converting them to meaningful knowledge. In a sense, it is a search for forecasting future’s possibilities by a computer program. Basically, “data mining” find the relationships on data sets with usage of patterns, ordering data sets and analyzing the data. The computer is responsible for determining the relationships, rules, and properties between the datas. The goal is to detect previously unrecognized data patterns. In other words, data mining is the semi-automatic discovery of patterns, relations, changes, irregularities, rules and statistically significant structures in data.