K. V. Bapa Rao

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We present an analytical formula for estimating the cardinality of the projection on certain attributes of a subset of a relation in a relational database. This formula takes into account a priori knowledge of the semantics of the real-world objects and relationships that the database is intended to represent. Experimental testing of the formula shows that(More)
Finding useful patterns in large datasets has attracted considerable interest recently and one of the most widely studied problems in this area is the identification of clusters, or densely y populated regions, in a multi-dimensional dataset. Prior work does not adequately address the problem of large datasets and minimization of I/O costs. Clustering of(More)
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