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In this paper, a survey about the basic data mining and its related fields like association rule mining has been undertaken. In our daily life, we come across a lot many things that have profit (external utility) value greater than the other itemsets in the database. Thus, a new concept that needs new work done is utility mining. Rare itemsets have been explained that are used for the mining of the items having utiliy vlue less than the threshold but are of great use. A brief literature surveydoi:10.21742/ijsbt.2015.3.2.03 fatcat:qwappavmgfbanlgzqiwnevh4h4