A data dictionary is sometimes described as "the database designer's database" because it records the design decisions about tables and their structures.
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Q10: RDBMSs enforce integrity rules automatically.
Q11: Relational algebra defines the theoretical way of
Q12: As rare as 1:1 relationships should be,
Q13: The practical significance of taking the logical
Q14: The DIFFERENCE operator subtracts one table from
Q16: If the attribute (B) is functionally dependent
Q17: Only a single attribute, not multiple attributes,
Q18: A null is created when you press
Q19: The one-to-many (1:M) relationship is easily implemented
Q20: The order of the rows and columns
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