| Table: Entity | |||
| Columns | |||
| Name | Type | Constraints | Description |
| entity_KEY | int | NOT NULL | AUTO-INCREMENT: Database assigned primary key for this table |
| update__staff_KEY | int | NOT NULL | |
| update_date_utc | datetime | NOT NULL | |
| entity_id | nvarchar (11) | NOT NULL | User defined identifier (unique). |
| description | nvarchar (250) | NOT NULL | User Defined description |
| create_date_utc | datetime | NOT NULL | |
| entity_id_sortable | varchar (48) | NOT NULL | A representation of the entity_id column that sorts in natural order, meaning that digits are sorted as numbers while non-digits are sorted alphabetically. A trigger keeps this field synchronized with the content of entity_id. |
| Primary key | |||
| Name | Columns | Description | |
| PK_Entity$entity_KEY | entity_KEY | CLUSTERED | |
| Unique constraints | |||
| Name | Columns | Description | |
| UK_Entity$entity_id | entity_id | Each id must be unique. | |
| UK_Entity$entity_id_sortable | entity_id_sortable | An index by the sortable ID is desired, and the algorithm ends up producing unique values. | |
| Incoming foreign keys | |||
| Name | Columns | Referencing table | Description |
| FK_Client__Entity__entity_KEY | entity_KEY | Client | |
| FK_Project_Template_Entity__Entity__entity_KEY | entity_KEY | Project_Template_Entity | |