sentences: Selecting views to materialize is one of the most important decisions in designing a data warehouse. In this paper, we present a framework for analyzing the issues in selecting views to materialize so as to achieve the best combination of good query performance and low view maintenance. We first develop a heuristic algorithm which can provide a feasible solution based on individual optimal query plans. We also map the materialized view design problem as O-l integer programming problem, whose solution can guarantee an optimal solution.