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. 12 . , 1- 2, 2- ..
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. 12.
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15
Customer Rental
Customer Rental (-) Customer No ( ). , . :
= (Property_No, Paddress, RentStart, RentFinish, Rent, Owner_No, OName).
- . , , PG4 PG16, ( Property_No) John Kay. , , c . .
( ) . Customer_Rental, , . 16. : (Customer_No, Property No), (Customer No, RentStart), (Property_No, RentStart). (Customer_No, Property_No) , . ( , RentFinish .)
16