Question:
Which operator can make a tuple relational query as an unsafe query?
Which operator can make a tuple relational query as an unsafe query?
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NOT can produce infinite results — always check domain of attributes.
Updated On: May 26, 2025
- AND
- OR
- IMPLIES
- NOT
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The Correct Option is D
Solution and Explanation
The NOT operator can result in queries referencing tuples not in the database (domain variables), leading to unsafe queries.
Unsafe queries return results not bound by database contents.
Unsafe queries return results not bound by database contents.
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