# 9.3.6 URI Search详解

* q 指定查询语句，使用Query String Syntax
* df 指定默认字段，不指定时会对所有字段进行查询
* Sort排序 / from 和size用于分页
* Profile 可以查看查询是如何被执行的

## Query String Syntax

* 指定字段 v.s 泛查询
  * q=title:2012  /   q=2012
* Term v.s Phrase
  * Beautiful Mind 等效于 Beautiful OR Mind
  * "Beautiful Mind"等效于Beautiful AND Mind。Phrase查询，还要求前后顺序保持一致
* 分组与引号
  * title:(Beautiful AND Mind)   - term查询要用"()"括起来
  * title="Beautiful Mind" - phrase查询要用""双引号
* 布尔操作
  * AND 、OR、NOT或者 && 、||、！
    * 必须大写
* 分组
  * \+ 表示must
  * \- 表示must\_not
* 范围查询
  * 区间表示：\[]闭区间，{}开区间
    * year:{2018 TO 2019}
    * year:\[\* TO 2018]
* 算数符号
  * year:>2010
  * year:(>2010 && <=2018)
  * year:(+>2010 -<2018)
* 通配符查询（通配符查询效率低，占用内存大，不建议使用。特别是放在最前面）
  * ？代表1个字符，\* 代表0或多个字符
    * title:mi?d
    * title:be\*
* 正则表达
  * title:\[bt]oy
* 模糊匹配与近似查询
  * title:befutifl\~1
  * title:"lord rings"\~2
    * 表示lord 和rings之间可以存在两个单词


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://wiki.clay-wangzhi.com/9-elasticsearch/9.3-elasticsearch-ru-men/9.3.6-uri-search-xiang-jie.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.