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Insulation between conceptual and physical structures
It can be defined as:
1. The Database Administrator should be capable to vary the storage structures without affecting users' views.
2. The internal structure of the database should be unaffected by the varies to the physical aspects of the storage, like changing to a new storage device.
3. The DBA should be able to vary the conceptual structure of the database without affecting all users.
While sorting field groups we cannot use more than one key field False.
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What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
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Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
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discuss the array implementation of a stack.
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