_____ is a unique key
1) three
2) four
3) five
4)six
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_____ is a unique key
1) three
2) four
3) five
4)six
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five is correct ans
hope it helps
Answer:
Unique key is a constraint that is used to uniquely identify a tuple in a table. Multiple unique keys can present in a table. NULL values are allowed in case of a unique key. These can also be used as foreign keys for another table
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