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