Question

What do you understand union compatibility of relations? For which
operations such compatibility is required and why?

Answer 1

Union compatibility relations are a set of tuples.

Explanation:

• Set operations can be applied to the relations, but it is not possible in all cases.
• Set operators can be only applied if the relations are Union Compatible.
• Union compatibility can be used in relationships where no integrity limitations are imposed between two or more relationships and the output we require is a Cartesian product.
• Cartesian product means where each and every entity set of one relation is displayed as a combination with every entity set of another relation.

Learn more about it.

Intersection set operation requires union compatible tables. state true or false .

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Answer 2

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