What is a recursive relationship? Give an example.

How would you $($graphically$)$ identify each of the following ERM components in notation? a$.$ an entity b$.$ the cardinality $(0,N)$ c$.$ a weak relationship $d.$ a strong relat $8.$ Discuss the difference between a composite key and a composite attribute. How be indicated in an ERD?

What two courses of action are available to a designer who encounters a multiva attribute?

What is a derived attribute? Give an example