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Database Systems - Section 5 :: Discussion
| 42. | A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be | |
| A. | the pin code | |
| B. | the last name | |
| C. | a compound key consisting of the first name and the last name | |
| D. | All of the above | |
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