> For the complete documentation index, see [llms.txt](https://docs.mongoing.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mongoing.com/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators.md).

# 逻辑查询运算符

> **注意**
>
> 有关特定运算符的详细信息，包括语法和示例，请单击特定运算符以转到其参考页。

| 名称                                                                                       | 描述                                 |
| ---------------------------------------------------------------------------------------- | ---------------------------------- |
| [`$and`](/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators.md) | 使用逻辑`AND`连接查询子句，返回与这两个子句条件匹配的所有文档。 |
| [`$not`](/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators.md) | 反转查询表达式的效果，并返回与查询表达式\_不\_匹配的文档。    |
| [`$nor`](/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators.md) | 用逻辑`NOR`连接查询子句，返回所有不能匹配这两个子句的文档。   |
| [`$or`](/can-kao/yun-suan-fu/query-and-projection-operators/logical-query-operators.md)  | 用逻辑`OR`连接查询子句，返回与任一子句条件匹配的所有文档。    |

译者：李冠飞

校对：


---

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