第一题:
[size=11.000000pt]1. When attempting to minimize memory usage, the most efficient way to do group processingwhen using the MEANS procedure is to use:
[size=11.000000pt]A. the BY statement.
[size=11.000000pt]B. GROUPBY with the NOTSORTED specification.
[size=11.000000pt]C. the CLASS statement.
D. multiple WHERE statements.
[size=14.6666669845581px]这题是选择A还是C呢? 如果是A,考虑sort么?
[size=14.6666669845581px]求助,谢谢~
[size=11.000000pt]
[size=11.000000pt]



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