Which statements are true of a projection? (Select two.)
A.
They can contain a comparison predicate.
B.
They can contain a join condition.
C.
They can only be created prior to loading data.
D.
They can be created at any time, either before or after data is loaded into a table.
E.
They can contain aggregate functions.
Explanation:
this is wrong
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The 3 selection about projection (in Vertica version 7.1) are true. These are B , D , E.
If I am wrong , please let me know
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Those questions are not up-to-date probably.
Correct 2 answers here are B and D in any case.
+ E, that corresponds to new features added in 7.1.0 version:
http://my.vertica.com/docs/7.1.x/HTML/index.htm#Authoring/NewFeatures/7.1/7.1.0/LiveAggregateProjectionsNFG.htm
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