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Your cousin asks you to help her prepare for her computer science exam next week. She gives you two clues about a type of relational database key: No column values may be NULL, and columns must be necessary for uniqueness. Which type of key is she referring to

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Martebi

In the case above, the type of key that she is referring to composite primary key.

What is the key about?

A primary key is known to be one that is made up of a column, or group of columns and it is often used to know a row.

The composite primary key is made up of multiple columns, known for its uniqueness, and as such In the case above, the type of key that she is referring to composite primary key.

Learn more about composite primary key from

https://brainly.com/question/10167757

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