You find that the execution time of reports in your datawarehouse
application is significantly high. You suspect the lack of indexes to
be the reason for the degradation in performance. Which advisory comp
onent would you refer to, in order to determine the appropriate index
es?
A. Memory Advisor
B. Segment Advisor
C. SQL Access Advisor
D. Automatic Workload Repository (AWR)
E. Automatic Database Diagnostic Monitor (ADDM)
Answer: C
你發現你的數據倉庫中的執行報告時間非常慢，你懷疑是缺少相應的索引，
可以使用 SQL Access Advisor（SQL 訪問指導）
SQL 訪問指導：處理方案問題並確定最佳數據訪問路徑（如索引和實體化視
圖） 。實體化視圖=物化試圖
物化視圖是包括一個查詢結果的數據庫對像，它是遠程數據的的本地副本，
或者用來生成基於數據表求和的匯總表。物化視圖存儲基於遠程表的數據，也可
以稱為快照。
