Geovisualization Developer's Guide

sum

When you use this function in a query, it calculates the sum of the values of the specified column in the specified dataset.

For more information on using query rules in a REST API request, see Queries.

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.

The codeblock example below calculates the sum of the values for the Magnitude column of the earthquake dataset, whose {DATASET_ID} is 90af668484394fa782cc103409cafe39, for each value in the Region column.

{
  "version": 0.3,
  "dataset": "90af668484394fa782cc103409cafe39",
  "namespace": {
    "sum": {
      "source": ["magnitude"],
      "apply": [{
        "fn": "sum", 
        "type": "aggregate"       
      }]
    }
  },  
  "metrics": ["sum"],
  "facets": ["region"]
}

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.