{
  "schemaName": "scores",
  "dimensionFieldSpecs": [
    {
      "name": "studentID",
      "dataType": "INT"
    },
    {
      "name": "subject",
      "dataType": "STRING"
    }
  ],
  "metricFieldSpecs": [
    {
      "name": "score",
      "dataType": "DOUBLE"
    }
  ],
  "dateTimeFieldSpecs": [{
    "name": "score_date",
    "dataType": "TIMESTAMP",
    "format" : "1:MILLISECONDS:EPOCH",
    "granularity": "1:MILLISECONDS"
  }],
  "primaryKeyColumns": ["studentID", "subject", "score_date"]
}