# List all Derived Columns

Get all the Calculated Fields (also called Derived Columns) in a dataset or environment. With the  query parameter, can return a single Calculated Field by its .

Endpoint: GET /1/derived_columns/{datasetSlug}
Version: 1.0.0
Security: configuration_key

## Path parameters:

  - `datasetSlug` (string, required)
    The dataset slug or use  for endpoints that support environment-wide operations.

## Query parameters:

  - `alias` (string)
    The Calculated Field .

## Response 400 fields (application/problem+json):

  - `error` (string, required)

  - `status` (number, required)
    The HTTP status code of the error.

  - `type` (string, required)
    Type is a URI used to uniquely identify the type of error.

  - `title` (string, required)
    Title is a human-readable summary that explains the  of the problem.

  - `detail` (string)
    The general, human-readable error message.

  - `instance` (string)
    The unique identifier (ID) for this specific error.

## Response 401 fields (application/json):

  - `error` (string)

## Response 404 fields (application/json):

  - `error` (string)

## Response 429 fields (application/json):

  - `error` (string)