In logical data independence, the conceptual schema can be changed without changing the external schema.
In physical data independence, the internal schema can be changed without changing the conceptual schema.
Mwalimu Bonface answered the question on February 13, 2018 at 07:36
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What is the difference between logical organization and physical organization of data in a database?
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What is the difference between logical organization and physical organization of data in a database?
Date posted:
February 13, 2018
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What is meant by data independence in database management systems?
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What is meant by data independence in database management systems?
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February 13, 2018
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Define the term data dictionary as used in database management systems?
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February 13, 2018
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February 13, 2018
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February 6, 2018
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February 6, 2018
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What purpose do the terminate() and unexpected() elements serve in a C++ computer program?
Date posted:
February 5, 2018
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Briefly explain how try, catch and throw work together to provide C++ exception handling.
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Briefly explain how try, catch and throw work together to provide C++ exception handling.
Date posted:
February 5, 2018
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What is a general class and what is its general form in a C++ computer program?
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What is a general class and what is its general form in a C++ computer program?
Date posted:
February 5, 2018
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What is a generic function and what is its general form in a C++ computer program?
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What is a generic function and what is its general form in a C++ computer program?
Date posted:
February 5, 2018
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What is the main advantage of run-time polymorphism? What is its potential disadvantage?
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What is the main advantage of run-time polymorphism? What is its potential disadvantage?
Date posted:
February 5, 2018
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If in a class hierarchy, a derived class neglects to override a virtual function,what happens when an object of that derived class that function in...
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If in a class hierarchy, a derived class neglects to override a virtual function,what happens when an object of that derived class that function in a computer program?
Date posted:
February 5, 2018
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Distinguish between an abstract and polymorphic classes.
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Distinguish between an abstract and polymorphic classes.
Date posted:
February 5, 2018
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What is a pure virtual function in a computer program?
Date posted:
February 5, 2018
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