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What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
a project based on normalization with first, second and third normalization. There need to be a diagram also
Define the phases of two phase locking protocol Growing phase: a transaction may get locks but not release any lock. Shrinking phase: a transaction might be release locks bu
What is schema
Explain the relevance of Data Dictionary in a Database System? Data dictionary is a database in its own right residing on the disk that consist of Meta data which is = Data abo
what is cascading? what is rollback cascading? please explain in detail
What is key ? Key - A single attribute or a combination of two or more attributes of an entity set which is used to recognize one or more instances (rows) of the set (table) is
er diagram on cosmetics.
What is a Phantom Deadlock? In distributed deadlock detection, the delay in propagating local information might cause the deadlock detection algorithms to recognize deadlocks
why shadow copy technique is used?
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