Referring to the company database, what is the primary key for the workson relation?

Referring to the company database, which relations have the same set of attributes for their default superkey and primary key?

Referring to the company database, which relations have a reasonable candidate key that is not its primary key?

Referring to the company database, specify an update operation to the department relation that will violate a primary key constraint constraint.

Referring to the company database, what constraints to the database would be violated if Smith were deleted from the employee relation? Include the relevant relations and attributes in your answer.

EMPLOYEE DEPENDENT Flgure 3.7 schema. FMDI OYFF DEPARTMENT DEPT_LOCATIONS WhDKE N PROJECT DEPENDENT EMPLOYEE DEPENDENT Flgure 3.7 schema. FMDI OYFF DEPARTMENT DEPT_LOCATIONS WhDKE N PROJECT DEPENDENT