Data mining is considered to deal with huge amounts of data which are kept in the database, to locate required information and facts. Data mining is the exploration and analysis of large quantities of data in order to discover valid, novel, potentially useful, and ultimately understandable patterns in data. Non-trivial extraction of implicit, previously unknown and potentially useful information from data Exploration & analysis, by automatic or semi-automatic means, of large quantities of data in order to discover meaningful patterns. In this paper, the authors discuss the data mining techniques and functionalities with application. Also, this paper discusses challenges in science and engineering, from the data mining perspective, with a focus on the data mining issues.