MCQOPTIONS
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MCQOPTIONS
| 1. |
What is the function of the unique constraint? |
| A. | It ensures that no two values under an attribute are identical |
| B. | It ensures that all the attributes are perfectly unique in their data type |
| C. | It ensures that all the relations in the database have a unique set of attributes |
| D. | It does not have any function in SQL |
| Answer» B. It ensures that all the attributes are perfectly unique in their data type | |