The practical significance of taking the logical view of a database is that it serves as a reminder of the simple file concept of data storage.
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Q8: Character data can contain any character or
Q9: Depending on the sophistication of the application
Q10: RDBMSs enforce integrity rules automatically.
Q11: Relational algebra defines the theoretical way of
Q12: As rare as 1:1 relationships should be,
Q14: The DIFFERENCE operator subtracts one table from
Q15: A data dictionary is sometimes described as
Q16: If the attribute (B) is functionally dependent
Q17: Only a single attribute, not multiple attributes,
Q18: A null is created when you press
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