| HEARTRATE_DAILY_CALORIESOUTOFRANGE | Calories spent while heartrate was oustide a heartrate [zone](https://help.fitbit.com/articles/en_US/Help_article/1565.htm#) |
| HEARTRATE_DAILY_CALORIESFATBURN | Calories spent while heartrate was inside the fat burn [zone](https://help.fitbit.com/articles/en_US/Help_article/1565.htm#) |
| HEARTRATE_DAILY_CALORIESCARDIO | Calories spent while heartrate was inside the cardio [zone](https://help.fitbit.com/articles/en_US/Help_article/1565.htm#) |
| HEARTRATE_DAILY_CALORIESPEAK | Calories spent while heartrate was inside the peak [zone](https://help.fitbit.com/articles/en_US/Help_article/1565.htm#) |
| LOCAL_DATE_TIME | Date time string with format `yyyy-mm-dd hh:mm:ss` |
| DEVICE_ID | A string that uniquely identifies a device |
| HEARTRATE | Intraday heartrate |
| HEARTRATE_ZONE | Heartrate [zone](https://help.fitbit.com/articles/en_US/Help_article/1565.htm#) that HEARTRATE belongs to. It is based on the heartrate zone ranges of each device |
| LOCAL_DATE_TIME | Date time string with format `yyyy-mm-dd 00:00:00`, the date is the same as the start date of a daily sleep episode if its time is after SLEEP_SUMMARY_LAST_NIGHT_END, otherwise it is the day before the start date of that sleep episode |
| TIMESTAMP | An UNIX timestamp (13 digits) when a row of data was logged (automatically created by RAPIDS)|
| LOCAL_DATE_TIME | Date time string with format `yyyy-mm-dd hh:mm:ss`, this either is a copy of LOCAL_START_DATE_TIME or LOCAL_END_DATE_TIME depending on which column is used to assign an episode to a specific day|
| DEVICE_ID | A string that uniquely identifies a device |
| TYPE_EPISODE_ID | An id for each unique main or nap episode. Main and nap episodes have different levels, each row in this table is one of such levels, so multiple rows can have the same TYPE_EPISODE_ID|
| DURATION | Duration of the episode level in minutes|
| IS_MAIN_SLEEP | 0 if this episode level belongs to a nap, or 1 if it belongs to a main sleep episode|
| TYPE | type of level: stages or classic [sleep data](https://dev.fitbit.com/build/reference/web-api/sleep/)|
| LEVEL | For stages levels one of `wake`, `deep`, `light`, or `rem`. For classic levels one of `awake`, `restless`, and `asleep`|