Geovisualization Developer's Guide


When you use this function in a query, it extracts the date in specified column in the specified dataset based on the value specified in the parameter params.

The allowed values are as follows:
  • second
  • minute
  • hour
  • day
  • dayofweek
  • dayofyear
  • week
  • month
  • year
  • quarter
  • decade

For more information on using query functions and operators in a REST API request, see Queries. For an end-to-end description of how to create a query, see Creating a Query.

  "version": 0.3,
  "dataset": "90af668484394fa782cc103409cafe39",
  "namespace": {
    "date_extraction": {
      "source": ["datetime"],
      "apply": [{
        "fn": "date_part", 
        "type": "transform",   
        "params": ["month"]
  "metrics": ["date_extraction"],

When you submit the above request, the response includes an HTTP status code and a JSON response body.

For more information on the HTTP status codes, see HTTP Status Codes.

For more information on the elements in the JSON structure in the response body, see Query.