（单选题）
In your datawarehousing application， you generate reports frequently. The data is static in the tables being used to generate reports. You are currently using joins， resulting in a large performance overhead. What kind of database structure would you use to reduce the response time of the query？（）
Ahash clusters
Bindex clusters
Cpartitioned tables
Dindexorganized table （IOT）
正确答案
答案解析
略
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