> ## Documentation Index
> Fetch the complete documentation index at: https://elementary-more-explicit-webhook-instructions.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# dimensions

`dimensions: [list of SQL expressions]`

Configuration for the test `dimension_anomalies`.
The test counts rows grouped by given column / columns / valid select sql expression.
Under `dimensions` you can configure the group by expression.

This test monitors the frequency of values in the configured dimension over time, and alerts on unexpected changes in the distribution.
It is best to configure it on low-cardinality fields.

* *Default: None*
* *Relevant tests: `dimension_anomalies`*
* *Configuration level: test*

<RequestExample>
  ```yml test
  models:
    - name: model_name
      config:
        elementary:
          timestamp_column: updated_at
      tests:
        - elementary.dimension_anomalies:
            dimensions:
              - device_os
              - device_browser
  ```
</RequestExample>