> For the complete documentation index, see [llms.txt](https://docs.docbits.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.docbits.com/chinese/guan-li-yu-she-zhi/settings/global-settings/document-types/table-columns/adding-a-new-column.md).
# 添加新列
当每个行项目都需要采集某个值，而默认列无法满足需求时，可以添加一列，例如成本中心、项目编号或内部物料编号。
## 开始之前
* 确定该列所属的**表格**。大多数文档类型只有一个表格（例如 `INVOICE_TABLE`）。如果列表为空，请先点击 **Create new table**；该对话框只要求填写表格名称。
* 确定**类型**：金额使用 `AMOUNT`，数量使用 `NUMBER`，日期使用 `DATE`，是/否使用 `BOOLEAN`，ISO 货币代码使用 `CURRENCY`，其他情况使用 `STRING`。保存后无法更改类型。
* 检查是否已有含义相同但被隐藏的**默认列**。隐藏列会带有 *Hidden* 标记；请取消隐藏该列，而不是创建重复列。
## 步骤
1. 打开 **Settings → Global Settings → Document Types → Table Columns**。
2. 点击 **Add new table column**。
添加新表格列
3. 填写对话框：
| 字段 | 填写内容 |
| ----------------------- | --------------------------------------------------------------------------------------- |
| **Title** | 用户在验证界面上看到的标签，例如 `Cost Centre`。仅限字母和数字。DocBits 会根据该值生成技术性 *Column name*（`COST_CENTRE`）。 |
| **Is column required?** | 如果任何行的该列为空时都不允许审批文档，请勾选。 |
| **Select column type** | 参见上方的类型列表。 |
| **Select Table** | 添加该列的表格。 |
4. 点击 **Proceed**。该列会出现在列表中，且 *Read Only*、*Hidden* 和 *Use AI* 标记均未设置。如有需要，可在列表中切换这些标记，参见[编辑和删除列](/chinese/guan-li-yu-she-zhi/settings/global-settings/document-types/table-columns/editing-and-deleting-columns.md)。
## 添加后
* **现有文档中的该列为空**。更改后上传或重新启动的文档会填充该列。
* 对于配置了**训练规则**的供应商，请在表格训练中打开该供应商的一份文档，并映射新列；否则该供应商的该列会一直为空。参见[定义表格和列](/chinese/guan-li-yu-she-zhi/setup/document-training/training-line-fields-table-training/defining-tables-and-columns.md)。
* 使用**AI 表格提取**时，如果该值能在文档中识别，AI 就会填充该列。如果供应商配置了训练规则，但该列仍应由 AI 提取，请将该列标记为 *Use AI*。
* 如果 ERP 需要接收该列，请将其添加到**导出映射**中，参见[导出](/chinese/guan-li-yu-she-zhi/settings/document-processing/export.md)。
## 消息
| 消息 | 含义 |
| -------------------------------------------------------------------------- | ----------------------------------------- |
| *Column name already exists* | 表格中已存在具有此技术名称的列。请选择其他标题。 |
| *Column name already exists – Please activate it in Table Column settings* | 此名称对应一个隐藏的默认列。请取消设置其 *Hidden* 标记，而不是创建新列。 |
| *No table exists. Please create table before creating columns.* | 此文档类型尚无表格：请先点击 **Create new table**。 |
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://docs.docbits.com/chinese/guan-li-yu-she-zhi/settings/global-settings/document-types/table-columns/adding-a-new-column.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
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.
