> For the complete documentation index, see [llms.txt](https://docs.cloudfabrix.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cloudfabrix.io/rda/rda-userguide/rda-data-management-cfxdm/cfxdm-dm-tail.md).

# cfxdm - dm:tail

**dm:tail:** This cfxdm tag allows the user to fetch last 'n' rows from the queried data.

**dm:tail** syntax**:** 

* **n (optional)**. Specify number of last rows that need to be listed. When this argument is not specified, by default it retrieves last 10 rows.

{% hint style="info" %}
For predictable results, use it along with **dm:sort** tag.
{% endhint %}

In the below example, for a reference, we are going to use **VMware vROps** as an extension to query the data and ingest it into **dm:tail** tag to list last 'n' rows.

Enter the below command to select **VMware vROps Datastore Summary tag (\*vrops:datastore\_summary**). (In this example, vrops name is used as a label to identify VMware vROps extension and it's tags. The label is defined while adding the extension in cfxdx configuration file or through UI)

```
tag *vrops:datastore_summary
```

![](/files/-MVdqUxBzyGEMfB4Lc_y)

**Example 1:** List last 10 rows

Get the data from VMware vROps Datastore Summary tag (**\*vrops:datastore\_summary**) and list last 10 rows.

```
data --> dm:tail
```

![](/files/-MVdw2pRyM8kXeG9l1kX)

**Example 2:** Sort the data in ascending order and List last 20 rows.

Get the data from VMware vROps Datastore Summary tag (**\*vrops:datastore\_summary**), sort the data by datastore name and list last 20 rows.

```
data --> dm:sort columns = 'name' --> dm:tail n = 20
```

![](/files/-MVdwzosWAYkR89JULr1)


---

# 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 dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.cloudfabrix.io/rda/rda-userguide/rda-data-management-cfxdm/cfxdm-dm-tail.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.