{"database": "fitbit", "table": "heart_rate_zones", "rows": [["2015-04-07", 1172, 47, 0, 0]], "columns": ["date", "below_zone_1", "in_zone_1", "in_zone_2", "in_zone_3"], "primary_keys": ["date"], "primary_key_values": ["2015-04-07"], "units": {}, "query_ms": 1.2626600000658073}