flashzxi commented on a change in pull request #5273:
URL: https://github.com/apache/iotdb/pull/5273#discussion_r835747722
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File path: docs/zh/UserGuide/Query-Data/Select-Expression.md
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@@ -106,6 +110,55 @@ Total line number = 5
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+## 逻辑运算查询
+#### 一元逻辑运算符
+支持运算符 `!`
+
+输入数据类型：`BOOLEAN`
+
+输出数据类型：`BOOLEAN`
+
+注意：`!`的优先级很高，记得使用括号调整优先级
+
+#### 二元比较运算符
+
+支持运算符 `>`, `>=`, `<`, `<=`, `==`, `!=`
+
+输入数据类型： `INT32`, `INT64`, `FLOAT`, `DOUBLE`
+
+会将所有数据转换为`DOUBLE`类型后进行比较。
+
+返回类型：`BOOLEAN`
+
+#### 二元逻辑运算符
+
+支持运算符 AND:`and`,`&`, `&&`; OR:`or`,`|`,`||`
+
+输入数据类型：`BOOLEAN`
+
+返回类型 `BOOLEAN`
+
+注意：当某个时间戳下左操作数和右操作数都为BOOLEAN类型时，二元逻辑操作才会有输出结果
Review comment:
Got it. ok
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