examples/twitter/group_by_query.body

{
    "queryType": "groupBy",
    "dataSource": "twitterstream",
    "granularity": "all",
    "dimensions": ["lang", "utc_offset"],
    "aggregations":[
      { "type": "count", "name": "rows"},
      { "type": "doubleSum", "fieldName": "tweets", "name": "tweets"}
    ],
    "filter": { "type": "selector", "dimension": "lang", "value": "en" },
    "intervals":["2012-10-01T00:00/2020-01-01T00"]
}