| Database Schema Tables / Engage Dimension and Fact Tables | |
Stores users and device use over time (use start, use end).
| Column | Description | Example | 
|---|---|---|
| user_device_id | bigint The unique id of the device user.  | 
		1 | 
| source_id | bigint The source id of the appliance providing the data.  | 
		1 | 
| device_id | bigint The device id.  | 
		13 | 
| device_identifier | varchar The device identifier.  | 
		02af6b70-ba1b-423b-a3d5-0b001c1430c3 | 
| user_id | bigint The user id.  | 
		82 | 
| user_login | varchar The user login name.  | 
		johnsmith | 
| device_use_started | datetime The time of the first activity of the user and device (Registered, Disconnected, Deliver).  | 
		2017-11-14 10:03:38.444000 | 
| device_use_ended | datetime The time of the last activity of the user and device (Disconnected, UnRegistered).  | 
		2017-11-15 08:29:56.570000 | 
| created_at | datetime The creation date.  | 
		2017-12-06 04:34:26.899000 | 
| updated_at | datetime The last updated date.  | 
		2017-12-06 04:34:26.899000 | 
| control_id | bigint The control id, indicating when the record was loaded or updated.  | 
		12637 |