[合集] 急问,在线等:SAS adv certification Question about SELECT v.s - Statistics版

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Statistics版 - [合集] 急问,在线等:SAS adv certification Question about SELECT v.s

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话题: select话题: question话题: selected话题: sas

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BeautifulBB (美丽宝宝) 于 (Thu Mar 19 19:19:56 2009) 提到:
Can anyone tell me what is the correct answer for the following question?
In which situation, SELECT is more efficient than IF/THEN ELSE?
A. In the samll amount selected data which is randomly distributed for
numeric variables.
B. In the samll amount selected data which is uniformly distributed for
numeric variables.
C. In the large amount selected data which is randomly distributed for
character var

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