define instance and schemainstance collection of
Define instance and schema?
Instance: Collection of data stored in the data base at a certain moment is
Schema: The overall design of the data base is known as the data base schema.
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give the levels of data abstractionthere are three levels of data abstractiona physical levelb logical levelc view
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define instance and schemainstance collection of data stored in the data base at a certain moment isschema the overall design of the data base is
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