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Home ‣ Database ‣ Database Design Using Normalization Comments
  • Question

  • We use the SQL construct COUNT(*) to count the number of rows in a table.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Database Design Using Normalization problems

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    • 1. Most of the time, modification anomalies cause problems that are severe enough that a table should be normalized into BCNF.

    • Options
    • A. True
    • B. False
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    • 2. One common design problem when designing a database from existing data is the use of a general-purpose remarks column in the received data.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. When building a database from an existing set of tables, we may safely assume that referential integrity constraints have been enforced on the data we are given.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Normalization requires programmers to write more complex SQL.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Denormalized tables are in BCNF.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. One common design problem when designing a database from existing data is the use of a single cell in one column to store multiple values of an attribute.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. We use the SQL construct COLUMNS(*) to determine the number and type of columns in a table.

    • Options
    • A. True
    • B. False
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    • 9. We can eliminate modification anomalies with proper normalization that results in tables in BCNF.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. When building a database from an existing set of tables, we may safely assume that there are no multivalued dependencies in the data we are given.

    • Options
    • A. True
    • B. False
      • Discuss

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