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UESTION 14   Consider the database schema below for cities in countries. A country have many cities, and the same city name can be found in different countries.   Country (ID: integer, Name: String (unique), SN: serialNumber (int)(unique)) City (serialNo: integer (unique, not null), CountryID: Integer, CityName: String, Population: integer)     The same country (ID , name) can be added twice in Country relation with different SN?     No, violates entity Integrity constraint     No, violates referential integrity constraint.       No, violates key constraint.     Yes.       No, violates domain constraints.

UESTION 14   Consider the database schema below for cities in countries. A country have many cities, and the same city name can be found in different countries.   Country (ID: integer, Name: String (unique), SN: serialNumber (int)(unique)) City (serialNo: integer (unique, not null), CountryID: Integer, CityName: String, Population: integer)     The same country (ID , name) can be added twice in Country relation with different SN?     No, violates entity Integrity constraint     No, violates referential integrity constraint.       No, violates key constraint.     Yes.       No, violates domain constraints.

Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
11th Edition
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Chapter10: Transaction Management And Concurrency Control
Section: Chapter Questions
Problem 1P
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QUESTION 14

  1.  

    Consider the database schema below for cities in countries. A country have many cities, and the same city name can be found in different countries.

     

    Country (ID: integer, Name: String (unique), SN: serialNumber (int)(unique))

    City (serialNo: integer (unique, not null), CountryID: Integer, CityName: String, Population: integer)

     

     

    The same country (ID , name) can be added twice in Country relation with different SN?

       

    No, violates entity Integrity constraint
       

    No, violates referential integrity constraint.

     
       

    No, violates key constraint.
       

    Yes.

     
       

    No, violates domain constraints.

     
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