Which type of constraint can be used to tell the DB2 Optimizer that a parent-child relationship exists between two tables, but that the relationship is not enforced?
A. Check
B. Unique
C. Referential
D. Informational
Which type of constraint can be used to tell the DB2 Optimizer that a parent-child relationship exists between two tables, but that the relationship is not enforced?
A. Check
B. Unique
C. Referential
D. Informational