{"database": "fitbit", "table": "heart_rate_zones", "rows": [["2015-05-30", 871, 33, 20, 20]], "columns": ["date", "below_zone_1", "in_zone_1", "in_zone_2", "in_zone_3"], "primary_keys": ["date"], "primary_key_values": ["2015-05-30"], "units": {}, "query_ms": 1.115228995331563}