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Home ‣ Database ‣ Managing Databases with Oracle See What Others Are Saying!
  • Question

  • Which of the following is not true about modifying table columns?


  • Options
  • A. You can drop a column at any time.
  • B. You can add a column at any time as long as it is a NULL column.
  • C. You can increase the number of characters in character columns or the number of digits in numeric columns
  • D. You cannot increase or decrease the number of decimal places.

  • Correct Answer
  • You cannot increase or decrease the number of decimal places. 

    • More questions

    • 1. The source of the data is sometimes called the system of record.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. All primary keys are required.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Entities use identifiers while tables use keys.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. SOAP is now just a name, not an acronym.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. A function returns one value and has only output parameters.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. Multiple and binary relationships are the same thing.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. Output reports should be included as part of an ERD.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. It is not easy to build a database correctly the first time.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. SOAP uses HTTP as its only transport mechanism.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A updatable view has its own data.

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

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