Table: Project_Template_Assignment
Columns
Name	Type	Constraints	Description
project_template_assignment_KEY	int	NOT NULL
update__staff_KEY	int	NOT NULL
update_date_utc	datetime	NOT NULL
create_date_utc	datetime	NOT NULL
staff_KEY	int	NOT NULL	Which staff is assigned.
project_template_KEY	int	NOT NULL	Which project template this assignment is for.
budgeted_hours	decimal (9, 2)	NOT NULL	Must be greater than or equal to zero, or -1.00 (to indicate assignment only without a budget.)
is_primary_assignment	bit	NOT NULL	Exactly one record per [project_template_KEY] should be set to true.

Primary key
Name	Columns		Description
PK_Project_Template_Assignment$project_template_assignment_KEY	project_template_assignment_KEY		CLUSTERED
Unique constraints
Name	Columns		Description
UK_Project_Template_Assignment$project_template_KEY$staff_KEY	project_template_KEY, staff_KEY
Indexes
Name	Columns		Description
IX_Project_Template_Assignment$staff_KEY	staff_KEY		Index supports foreign key FK_Project_Template_Assignment__Staff__staff_KEY

Foreign keys
Name	Columns	Referenced table	Description
FK_Project_Template_Assignment__Project_Template__project_template_KEY	project_template_KEY	Project_Template
FK_Project_Template_Assignment__Staff__staff_KEY	staff_KEY	Staff	on delete cascade;