计算机科学 ›› 2003, Vol. 30 ›› Issue (12): 86-88.
王新军 洪晓光 王海洋
摘要: For the materialized views in the fast LAN or computing grid environment, it is a very important problem that how to refresh them efficiently when data sources have changed. In this paper, we take the update frequencies and the size of source relations in
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