title: niagaracq : a scalable continuous query system for internet databases j chen , d dewitt , f tian , y wang sigmod conference 2000. authors: nan. venue: nan. year: nan
title: wangy ( 2000 ) niagaracq : a scalable continuous query system for internet databases j chen , dt dewitt , f tian. authors: nan. venue: proceedings of the acm sigmod. year: nan