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Whst is logical schema ? Logical schema is the entire database.
Explain the disadvantages of creating a temporary table? If you have already created a temporary table with a shown name and attempting to create a second one with that nam
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
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Define value set? Value set: It is a set of values. You do not always need a user to enter junk free text within all the fields. Therefore, Oracle Apps uses value set to valida
What is meant by heuristic optimisation? Discuss the main heuristics that are applied during query optimisation. Ans: In heuristic optimization, heuristics are employed to r
What are the advantages of creating a table from existing table?
gyan gurukul is a software company that provides software related solution.
#question.what is mapping constraints and types?.
diagrams and meaning
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