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Exam C2090-600 All Questions

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Exam C2090-600 topic 1 question 6 discussion

Actual exam question from IBM's C2090-600
Question #: 6
Topic #: 1
[All C2090-600 Questions]

What is an advantage of using range partitioned tables?

  • A. Ability to run utilities against the partitions in parallel
  • B. Increased query performance through data partition elimination
  • C. Block indexes are much smaller than RID indexes, providing better performance
  • D. Table data is automatically and continuously clustered, requiring minimal reorganization
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Suggested Answer: B 🗳️
Reference:
https://www.ibm.com/developerworks/data/library/techarticle/dm-0605ahuja2/#query
by db2tester at Nov. 19, 2019, 3:46 p.m.

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db2tester
4 years, 11 months ago
See also reference : https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.admin.perf.doc/doc/c0021579.html
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db2tester
5 years ago
The answer B is correct. The answer C applies only on the MDC Table (Multi-Dimensional Clustering). Block Indexes are created with one or several table's dimensions and will reference several data blocks (block=extents) of the table. Each block will group data by dimension. The answer D applies only on the RCT Table (Range Clustered Table). Indeed, its RID is computed by a key sequence (with one or several table's columns), the RCT table is clustered by default.
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