> ## Documentation Index
> Fetch the complete documentation index at: https://docs.elementary-data.com/llms.txt
> Use this file to discover all available pages before exploring further.

# column_anomalies

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`column_anomalies: [column monitors list]`

Select which monitors to activate as part of the test.

* *Default: default monitors*
* *Relevant tests: `all_columns_anomalies`, `column_anomalies`*
* *Configuration level: test*

<RequestExample>
  ```yml test theme={null}
  models:
    - name: this_is_a_model
      data_tests:
        - elementary.column_anomalies:
            arguments:
              column_anomalies:
                - null_count
                - missing_count
                - average
  ```
</RequestExample>

#### Supported column monitors

**Default monitors by type:**

| Data quality metric  | Column Type |
| -------------------- | ----------- |
| `null_count`         | any         |
| `null_percent`       | any         |
| `min_length`         | string      |
| `max_length`         | string      |
| `average_length`     | string      |
| `missing_count`      | string      |
| `missing_percent`    | string      |
| `min`                | numeric     |
| `max`                | numeric     |
| `average`            | numeric     |
| `zero_count`         | numeric     |
| `zero_percent`       | numeric     |
| `standard_deviation` | numeric     |
| `variance`           | numeric     |

**Opt-in monitors by type:**

| Data quality metric | Column Type |
| ------------------- | ----------- |
| `sum`               | numeric     |