> ## 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*

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

#### 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 |


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