Unformatted text preview: several degrees and so then you would relate the two entities. 5. The customer owns the car; The car gets maintenance; Every car that gets maintenance has to have a maint_line; maint_line can have zero parts or many parts. Cardinalities: CUSTOMER (1:1) ______ owns_______ CAR (0:N) CAR (1:1) ____________ gets____________ MAINTENANCE (1:N) MAINTENANCE (1:1) ___ includes__ MAINT_LINE (1:N) MAINT_LINE (1:N) __ is written in___ PART (1:1) 6. A recursive relationship is when a relationship exists within the same entity. For example, an employee (who is also a manager) within the EMPLOYEE entity manages one or more other employees within that same entity. Therefore, EMPLOYEE has a relationship with itself. Problem 10 Having some trouble with this one....
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- Summer '08
- Business, Entity-relationship model, entity