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_____ completeness means that every supertype occurrence must be a member of at least one subtype.
Q3: A system is always at some stage
Q6: The _ command restricts the selection of
Q22: What are database checkpoints?
Q26: It is a relatively easy task to
Q31: Which is a feature of a correlated
Q33: _ is/are the central activity during the
Q41: A persistent stored module is stored and
Q48: The overall purpose of the database initial
Q67: Define an index. Explain the role of
Q74: Triggers can only be used to update