<!--秀川譯--> ## 多字段搜索 只有一個簡單的`match`子句的查詢是很少的。我們經常需要在一個或者多個字段中查詢相同的或者不同的查詢字符串，意味著我們需要能夠組合多個查詢子句以及使他們的相關性得分有意義。 或許我們在尋找列夫·托爾斯泰寫的一本叫《戰爭與和平》的書。或許我們在Elasticsearch的文檔中查找`minimum should match`，它可能在標題中，或者在一頁的正文中。或許我們查找名為John，姓為Smith的人。 在這一章節，我們會介紹用于構建多個查詢子句搜索的可能的工具，以及怎么樣選擇解決方案來應用到你特殊的場景。 <!-- [[multi-field-search]] == Multifield Search Queries are seldom simple one-clause `match` queries. ((("multifield search"))) We frequently need to search for the same or different query strings in one or more fields, which means that we need to be able to combine multiple query clauses and their relevance scores in a way that makes sense. Perhaps we're looking for a book called _War and Peace_ by an author called Leo Tolstoy. Perhaps we're searching the Elasticsearch documentation for ``minimum should match,'' which might be in the title or the body of a page. Or perhaps we're searching for users with first name John and last name Smith. In this chapter, we present the available tools for constructing multiclause searches and how to figure out which solution you should apply to your particular use case. -->