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Free NR0-015 Exam Braindumps (page: 7)

Page 6 of 28
PDF with 110 Questions

Joining tables on their primary index allows the Optimizer to choose which three highly effective join plans? (Choose three.)

  1. Hash Join
  2. Cross Join
  3. Merge Join
  4. Nested Join
  5. Product Join

Answer(s): A,C,D



Which statement is true of row inserts into a table with an identity column?

  1. Serialization is guaranteed.
  2. Numbering gaps can occur.
  3. Generated numbers reflect row insertion sequence.
  4. Values will be unique if the GENERATED BY DEFAULT option is used.

Answer(s): B



When would you use identity columns? (Choose three.)

  1. when more even data distribution is needed
  2. to reduce the need to generate keys outside of Teradata
  3. to facilitate moving applications from other systems to Teradata
  4. when users need key values with hidden significance or intelligence

Answer(s): A,B,C



What are two performance benefits of using global temporary tables? (Choose two.)

  1. They share data between user sessions.
  2. They allow reuse of intermediate results.
  3. Referential Integrity rules can be enforced.
  4. There are no locks placed on any objects when they are materialized or dropped.

Answer(s): B,D






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