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A NULL value in SQL represents:
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Subject
Computer Science
Topic
Databases
Subtopic
SQL
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easy
The number zero
An unknown or missing value
An empty string
A syntax error
Correct Answer
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Explanation
NULL denotes the absence of a value (unknown or inapplicable) and is distinct from zero or an empty string.…
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Concept Behind This Question
This question focuses on the concept of SQL under the broader topic of Databases.
Related key concepts: databases, sql.
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Question Details
- Subject:
- Computer Science
- Topic:
- Databases
- Subtopic:
- SQL
- Difficulty:
- easy
- Source:
- Silberschatz Database System Concepts 7th Ed Ch.3
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