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Database Systems Practice Test 137
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MCQ 681: Each record type defines a fixed number of
MCQ 682: The names of the attributes in the result are derived from the names of the attributes in the relations in the
MCQ 683: In E-R diagrams, the relationship set associating the weak entity set to the identifying strong entity set is represented by
MCQ 684: The contents of a relation instance may change with time as the relation
MCQ 685: Process of switching from finer-granularity data to a coarser granularity can take place by means of
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