Maurice Tutor

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    Argosy University/ Phoniex University/
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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 22 Sep 2017 My Price 3.00

SQL assertion

Assume that you are given a relation with attributes ABCD.

1. Assume that no record has NULL values. Write an SQL query that checks whether the functional dependency A → B holds.

2. Assume again that no record has NULL values. Write an SQL assertion that enforces the functional dependency A → B.

3. Let us now assume that records could have NULL values. Repeat the previous two questions under this assumption.

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Maurice Tutor
(5)
Status NEW Posted 22 Sep 2017 09:09 PM My Price 3.00

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