Abstract: Data mining is the process of extracting hidden analytical information from large databases using multiple algorithms and techniques. Classification technique can be solving several problems in different fields like medicine, industry, business, and science. Basically it involves finding rules that categorize the data into disjoint groups. In this paper we present the basic classification techniques. Several major kinds of classification method including decision tree, CHID, ID3, C4.5 and C5.5algorithms. The goal of this paper is to provide a review of different classification techniques in data mining.

Keywords: CHAID, CART, ID3, C4.5, C5.0, Hunt’s algorithm.