隨著巨量資料的議題逐漸被重視，有越來越多的巨量資料的分析都利用MapReduce作計算處理。而在資料庫查詢中，天際線查詢是一種常見的決策分析方法，其目的是要幫助使用者找出資料庫中各維度的數值貼近使用者查詢條件的資料。然而，過去在大量資料的查詢方法中，如果資料筆數較多，同時查詢的維度也大的情況下，往往會有著效率不彰的問題。因此，本研究提出一種在大量資料中，有效率應用MapReduce作天際線查詢的方法。而根據實驗結果顯示，我們的方法，比先前方法更有效率。

With the big data issue being taken seriously today, more and more big data is processed with MapReduce. Moreover, skyline query is a common method for decision making, which helps users find the data whose value in each dimension is close to the user query. In the past, if the data is huge, or the data space involves many dimensions, the query processing becomes inefficient. Therefore, in this study, we present a new method to process skyline queries with MapReduce. According to the experimental results, our method is more efficient than previous methods.

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