At present, due to the developments in Database Technology, large volumes of data are produced by everyday operations and they have introduced the necessity of representing the data in High Dimensional Datasets. Discovering Frequent Determinant Patterns and Association Rules from these High Dimensional Datasets has become very tedious since these databases contain large number of different attributes. For the reason
that, it generates extremely large number of redundant rules which makes the algorithms inefficient and it does not fit in main memory.In this paper, a new Association Rule Mining approach is presented, and it efficiently discovers Frequent Determinant Patterns and Association Rules from High Dimensional Datasets. The proposed approach adopts the conventional Apriori algorithm and device anew CApriori algorithm to prune the generated Frequent Determinant Sets effectively. A Frequent Determinant set is selected if its value is first compared with Conviction threshold value and then compared with Support threshold. This double comparison will eliminate the redundancy and generate strong Association Rules.To improve the mining process, this algorithm also makes use of a compressed data structure f_list constructed from feature attributes selected using Heuristic Fitness Function (HFF) and a Heuristic Discretization algorithm. It also makes use of Count Array (CA) devised as One Dimensional Triple Array pair set to minimize main memory utilization. This comprehensive study shows that the approach outperforms with traditional Apriori and obtains more rapid computing speed and at the same time generates Sententious Rules. Further the mining methodology is ascertained to be better in generating strong Association Rules from High Dimensional Databases.