Free NR0-016 Exam Braindumps (page: 3)

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What are two characteristics of an aggregate join index? (Choose two.)

  1. Can be directly referenced by a query
  2. Must contain more than one table reference
  3. Can be created using a Global Temporary table
  4. Automatically reflects changes in the underlying detail data
  5. COUNT is automatically present if SUM is used

Answer(s): D,E



Which four factors are important to consider when deciding whether to calculate summary results on demand or to create a summary table? (Choose four.)

  1. Concurrency of users
  2. Typical rows per value
  3. Response time requirements
  4. Complexity of the calculations
  5. Frequency of summary request
  6. Volatility of the column to summarize

Answer(s): C,D,E,F



Why should you create a view with aggregation? (Choose two.)

  1. To reduce query complexity
  2. To minimize macro executions
  3. To improve query performance
  4. To minimize summary table maintenance

Answer(s): A,D



To ensure you are working with current, consistent data, which lock should you recommend form SELECT queries in a multi-user environment with update activity?

  1. Read
  2. Write
  3. Access
  4. Exclusive

Answer(s): A






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