title: optimizing queries across diverse data sources. authors: l haas , d kossmann , e wimmers , j yang. venue: vldb. year: 1997
title: optimizing queries across diverse data sources. authors: lm hass , d kossmann , el wimmers , j yang , l raschid. venue: proceedings of the 23rd vldb conference , athens , greece , acm & hellip ; ,. year: nan