> For the complete documentation index, see [llms.txt](https://help.impact.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.impact.com/brand/zh/what-would-you-like-to-learn-about/platform-features/promo-codes/regular-expression/match-expression-tool-regex.md).

# Match Expression Tool 正则

当你知道产品 SKU、类别或促销代码中的部分字符组合，并希望将这些字符组合与随转化传入的 SKU、类别或促销代码进行匹配时，就会使用匹配表达式工具。只有当你没有完整的项目列表时，才需要使用此工具在一个 [例外列表](/brand/zh/what-would-you-like-to-learn-about/account-administration/program-settings/exception-lists/create-category-and-sku-exception-lists.md).

1. 从顶部导航栏中，选择 ![](/files/1cbb667ec4878308f24ec4acd13cbf03ede0bdfe) **\[User profile] → Settings**.
2. 在右侧列中，下面 *例外列表*下，选择 *例外列表* 部分下，选择 **SKU**.
3. 选择 **添加新的 SKU 列表**.
4. 选择 **显示高级设置** ![](/files/bfd64eeb089ad3f4ad099b98dcba9275c62df4c0).
5. 在“匹配表达式”字段中，这是匹配表达式工具的 2 个重要组成部分：

   <div data-with-frame="true"><figure><img src="/files/726b87c4d7fefa218a898247772874a5a9892523" alt="" width="563"><figcaption></figcaption></figure></div>

   | 组件                                                                                                                                          | 说明                          |
   | ------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------- |
   | [括号内的正则表达式](/brand/zh/what-would-you-like-to-learn-about/platform-features/promo-codes/regular-expression/regex-inside-the-parentheses.md)  | 与配套的例外列表中的项目完全匹配。           |
   | [括号外的正则表达式](/brand/zh/what-would-you-like-to-learn-about/platform-features/promo-codes/regular-expression/regex-outside-the-parentheses.md) | 为例外列表中的项目设置与传入的转化数据进行匹配的条件。 |


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