title: congressional samples for approximate answering of group-by queries viswanath poosala , swarup acharya , phillip b. gibbons sigmod conference. authors: nan. venue: nan. year: 2000.0
title: congressional samples for approximate answering of group-by queries international conference on management of data. authors: swarup acharya , phillip b. gibbons , viswanath poosala. venue: nan. year: 2000.0