Merge pull request #24696 from taosdata/mark/3.0-doc

docs:add description for \x

docs/en/12-taos-sql/18-escape.md

@@ -7,14 +7,14 @@ description: This document describes the usage of escape characters in TDengine.
 
 | Escape Character | **Actual Meaning**       |
 | :--------------: | ------------------------ |
-|       `\'`       | Single quote '           |
+|       `\'`       | Single quote `'`           |
-|       `\"`       | Double quote "           |
+|       `\"`       | Double quote `"`           |
-|        \n        | Line Break               |
+|       `\n`        | Line Break               |
-|        \r        | Carriage Return          |
+|       `\r`        | Carriage Return          |
-|        \t        | tab                      |
+|       `\t`        | tab                      |
-|       `\\`       | Back Slash \             |
+|       `\\`       | Back Slash `\ `             |
-|       `\%`       | % see below for details  |
+|       `\%`       | `%` see below for details  |
-|       `\_`       | \_ see below for details |
+|       `\_`       | `_` see below for details |
 
 ## Restrictions
 
@@ -22,5 +22,5 @@ description: This document describes the usage of escape characters in TDengine.
    - Identifier without ``: Error will be returned because identifier must be constituted of digits, ASCII characters or underscore and can't be started with digits
    - Identifier quoted with ``: Original content is kept, no escaping
 2. If there are escape characters in values
-   - The escape characters will be escaped as the above table. If the escape character doesn't match any supported one, the escape character "\" will be ignored.
+   - The escape characters will be escaped as the above table. If the escape character doesn't match any supported one, the escape character `\ ` will be ignored(`\x` remaining).
-   - "%" and "\_" are used as wildcards in `like`. `\%` and `\_` should be used to represent literal "%" and "\_" in `like`,. If `\%` and `\_` are used out of `like` context, the evaluation result is "`\%`"and "`\_`", instead of "%" and "\_".
+   - `%` and `_` are used as wildcards in `like`. `\%` and `\_` should be used to represent literal `%` and `_` in `like`. If `\%` and `\_` are used out of `like` context, the evaluation result is `\%` and `\_`, instead of `%` and `_`.

docs/zh/12-taos-sql/18-escape.md

@@ -8,16 +8,15 @@ description: TDengine 中使用转义字符的详细规则
 
 | 字符序列 | **代表的字符** |
 | :------: | -------------- |
-|   `\'`   | 单引号'        |
+|   `\'`   | 单引号`'`        |
-|   `\"`   | 双引号"        |
+|   `\"`   | 双引号`"`        |
-|    \n    | 换行符         |
+|   `\n`    | 换行符         |
-|    \r    | 回车符         |
+|   `\r`    | 回车符         |
-|    \t    | tab 符         |
+|   `\t`    | tab 符         |
-|   `\\`   | 斜杠\          |
+|   `\\`   | 斜杠 `\ `          |
-|   `\%`   | % 规则见下     |
+|   `\%`   | `%` 规则见下     |
-|   `\_`   | \_ 规则见下    |
+|   `\_`   | `_` 规则见下    |
 
-:::
 
 ## 转义字符使用规则
 
@@ -25,5 +24,5 @@ description: TDengine 中使用转义字符的详细规则
    1. 普通标识符： 直接提示错误的标识符，因为标识符规定必须是数字、字母和下划线，并且不能以数字开头。
    2. 反引号``标识符： 保持原样，不转义
 2. 数据里有转义字符
-   1. 遇到上面定义的转义字符会转义（%和\_见下面说明），如果没有匹配的转义字符会忽略掉转义符\。
+   1. 遇到上面定义的转义字符会转义（`%`和`_`见下面说明），如果没有匹配的转义字符会忽略掉转义符`\ `（`\x`保持原样）。
-   2. 对于%和\_，因为在 like 里这两个字符是通配符，所以在模式匹配 like 里用`\%`%和`\_`表示字符里本身的%和\_，如果在 like 模式匹配上下文之外使用`\%`或`\_`，则它们的计算结果为字符串`\%`和`\_`，而不是%和\_。
+   2. 对于`%`和`_`，因为在`like`里这两个字符是通配符，所以在模式匹配`like`里用`\%`和`\_`表示字符里本身的`%`和`_`，如果在`like`模式匹配上下文之外使用`\%`或`\_`，则它们的计算结果为字符串`\%`和`\_`，而不是`%`和`_`。