mysql> desc order_group;
+---------------------+--------------+------+-----+---------+----------------+
| Field               | Type         | Null | Key | Default | Extra          |
+---------------------+--------------+------+-----+---------+----------------+
| order_group_id      | int(11)      | NO   | PRI | NULL    | auto_increment |
| order_set_id        | int(11)      | YES  | MUL | NULL    |                |
| patient_id          | int(11)      | NO   | MUL | NULL    |                |
| encounter_id        | int(11)      | NO   | MUL | NULL    |                |
| creator             | int(11)      | NO   | MUL | NULL    |                |
| date_created        | datetime     | NO   |     | NULL    |                |
| voided              | tinyint(1)   | NO   |     | 0       |                |
| voided_by           | int(11)      | YES  | MUL | NULL    |                |
| date_voided         | datetime     | YES  |     | NULL    |                |
| void_reason         | varchar(255) | YES  |     | NULL    |                |
| changed_by          | int(11)      | YES  | MUL | NULL    |                |
| date_changed        | datetime     | YES  |     | NULL    |                |
| uuid                | char(38)     | NO   | UNI | NULL    |                |
| nested_order_groups | int(11)      | YES  |     | NULL    |                |
+---------------------+--------------+------+-----+---------+----------------+