Question

3. A key that can be used to uniquely identify a row in a table is called a key​

Answer 1

Answer:

SQL keys are used to uniquely identify rows in a table. SQL keys can either be a single column or a group of columns. Super key is a single key or a group of multiple keys that can uniquely identify tuples in a table. Super keys can contain redundant attributes that might not be important for identifying tuples.

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