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The_______ function allows substitution of values in an attribute of a tuple(a) Cube(b) Unknown(c) Decode(d) SubstituteThe question was posed to me during a job interview.I'd like to ask this question from OLAP in section Intermediate and Advanced Sql of RDBMS

Answer»

The correct choice is (c) Decode

For EXPLANATION: The decode function allows substitution of values in an ATTRIBUTE of a tuple. The decode function does not always work as we MIGHT like for null values because predicates on null values EVALUATE to UNKNOWN.



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