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Relational Database Design

OWNER. 1. (1, N). own. N. (1, 1). incur. (1, 1). (0, N). MAINTENANCE. PROPERTY. 1. N. (0, N). 1. N. (0, N). for. rent. (1, 1). ACCOUNT. N. (1, 1). N. M. (1, N). pay. TENANT. (1, N). Relational Database Design. Relational Database Design.

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Relational Database Design

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  1. OWNER 1 (1, N) own N (1, 1) incur (1, 1) (0, N) MAINTENANCE PROPERTY 1 N (0, N) 1 N (0, N) for rent (1, 1) ACCOUNT N (1, 1) N M (1, N) pay TENANT (1, N) Relational Database Design Relational Database Design Perform the complete transformation steps for the E-R Model of the ‘Real Estate Agency’ described in Topic4. 1 Topic 5 : Relational Database Design

  2. The PROPERTY relation is modified: PROPERTY (Building#, Address, Value, Owner#) -- Relational Database Design Solution -- From Step1 OWNER ( Owner #, Owner Name, Owner Address) PROPERTY ( Building#, Address, Value) TENANT(Tenant#, Family Name, First Name, Contact Address, Phone#) MAINTENANCE (Maintenance#, Date, Type, Cost) ACCOUNT( Acct Receipt#, DateofPayment, TypeofAccount, AmountPaid) -- Step2:No weak entity -- Step3:no 1 To 1 relationship -- Step3 -- Step4:1 To N between OWNER and PROPERTY Topic 5 : Relational Database Design

  3. The MAINTENANCE relation is modified to: MAINTENANCE(Maintenance#, Date, Type, Cost, Building#) The ACCOUNT relation is modified to: ACCOUNT( Acct Receipt#, DateofPayment, TypeofAccount, AmountPaid,Tenant#) The ACCOUNT relation is modified to: ACCOUNT( Acct Receipt#, DateofPayment, TypeofAccount, AmountPaid,Tenant#, Building#) -- -- -- Relational Database Design Solution -- Step4:1 To N between PROPERTY and MAINTENANCE -- Step4:1 To N between TENANT and ACCOUNT -- Step4:1 To N between PROPERTY and ACCOUNT Topic 5 : Relational Database Design

  4. The RENT relation is created: RENT (Building#, Tenant#, LeasedPeriod, Bond) -- Relational Database Design Solution --Step5:M to N relationship between TENANT and PROPERTY -- Step6:no multivalued attribute. -- Step7:no ternary relatiosnhip - Topic 5 : Relational Database Design

  5. Relational Database Design Solution -- Finally, the end result of the transformation can be listed as follows. Step 1 OWNER ( Owner #, Owner Name, Owner Address) PROPERTY (Building#, Address, Value, Owner#) TENANT(Tenant#, Family Name, First Name, Contact Address, Phone#) MAINTENANCE(Maintenance#, Date, Type, Cost, Building#) ACCOUNT( Acct Receipt#, DateofPayment, TypeofAccount, AmountPaid, Tenant#, Building#) RENT(Building#, Tenant#, LeasedPeriod, Bond) Step 4 Step 1 Step 4 Step 4 Step 5 Topic 5 : Relational Database Design

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