# cfxdm - dm:concat

**dm:concat:** This cfxdm tag allows the user to merge two or more named datasets.

**dm:concat** syntax**:** 

* **names** (mandatory)**:** List of two or more named datasets, supports regex

{% hint style="info" %}
Please refer [**dm:save**](/rda/rda-userguide/rda-data-management-cfxdm/cfxdm-dm-save.md) and [**dm:savedlist**](/rda/rda-userguide/rda-data-management-cfxdm/cfxdm-dm-savedlist.md) tags on how to create and list named datasets.
{% endhint %}

Use [**dm:savedlist**](/rda/rda-userguide/rda-data-management-cfxdm/cfxdm-dm-savedlist.md) tag to list saved datasets

```
tag dm:savedlist
```

```
data
```

![](/files/-MW63U6ICfm6eSUgjqdF)

**Example 1:** 

From the above named datasets, merge **prtg-alerts** & **vrops-alerts** into one new named dataset using dm:concat tag

```
tag dm:concat
```

```
data names = "prtg-alerts|vrops-alerts" --> dm:save name = 'consolidated-alerts'
```

OR

```
data names = ".*.alerts|.*.alerts" --> dm:save name = 'consolidated-alerts'
```

Change the tag to **dm:savedlist** to view the newly created 'consolidated-alerts' named dataset.

```
tag dm:savedlist
```

```
data
```

![](/files/-MW65VfMafJq5b_CgkxU)


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