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TE0-123 Teradata 12 Physical Design and Implementation exam We believe in helping our customers achieve their goals. For this reason, we take great care while preparing our Questions and Answers , Core Administration. Our practice tests Administration are prepared with the help of highly professional people from the industry, so we benefit from their vast experience and knowledge.
Q1
Which situation is most likely to be a good candidate to consider for a multi-column statistic?
(Choose one.)
A. multi-column USI
B. multi-level partitioning columns
C. multi-column non-equalityjoin columns
D. multiple columns participating in a NUSI
Answer: B
Q2
In what order are the columns concatenated for multi-column statistics?
A. field ID order
B. alphabetical order of the columns
C. column size order (smallest to largest)
D. order of columns in the COLLECT STATISTICS statement
Answer: A
Q3
Which two are limitations of a UPI? (Choose two.)
A. It may not be compressed.
B. It may contain no more than 32 columns.
C. It may not be defined on a Volatile Table.
D. It may not be defined in a single table join index.
Answer: C,D
Q4
A user is looking at an Explain plan and notices the Optimizer is going to duplicate a large table
on all AMPs instead of performing a product join. What is the most likely reason the Optimizer
chose this plan?
A. The statistics might be stale.
B. The join column is not indexed on either table.
C. The plan will save CPU by duplicating large tables onto all AMPs.
D. A hash join will be used in the current step instead of a product join.
Answer: D
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