elasticsearch group-by multiple fields

Question

I am Looking for the best way to group data in elasticsearch. Elasticsearch doesn\'t support something like \'group by\' in sql.

Lets say I have 1k categories and mi

Answer 1

sub-aggregations is what you need .. though this is never explicitly stated in the docs it can be found implicitly by structuring aggregations

It will result the sub-aggregation as if the query was filtered by result of the higher aggregation. It actually looks like as if this is what happens in there.

{
"aggregations": {
    "VALUE1AGG": {
      "terms": {
        "field": "VALUE1",
      },
      "aggregations": {
        "VALUE2AGG": {
           "terms": {
             "field": "VALUE2",
          }
        }
      }
    }
  }
}