Table: Department
Department is a grouping that Staff can be assigned to.
Columns
Name | Type | Constraints | Description
department_KEY | int | NOT NULL | AUTO-INCREMENT: Database assigned primary key for this table.
update__staff_KEY | int | NOT NULL |
update_date | datetime | NOT NULL |
department_id | nvarchar (11) | NOT NULL | User defined identifier (unique).
description | nvarchar (30) | NOT NULL | User defined description.
create_date | datetime | NOT NULL |
department_id_sortable | varchar (48) | NOT NULL | A representation of the department_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 department_id.

Primary key
Name | Columns | Description
PK_Department$department_KEY | department_KEY | CLUSTERED
Unique constraints
Name | Columns | Description
UK_Department__department_id | department_id | Each id must be unique.
UK_Department__department_id_sortable | department_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_Staff__Department__department_KEY | department_KEY | Staff |
FK_Project_Template__Department__department_KEY | department_KEY | Project_Template |
FK_Project__Department__department_KEY | department_KEY | Project |