title: estimating the output cardinality of partial preaggregation with a measure of clusteredness. authors: s helmer , t neumann , g moerkotte. venue: vldb. year: 2003
title: estimating the output cardinality of partial preaggregation with a measure of clusteredness. authors: s helmer , t neumann , g moerkotte. venue: proceedings of the international conference on very large & hellip ; ,. year: 2003.0