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What are the various cases where use of a NULL value would be appropriate?
Wiki User
∙ 6y ago
- Optional data fields: NULL can be used to indicate that certain fields in a database can have no value assigned to them.
- Unknown data: NULL can be used to represent missing or unknown information.
- Default values: NULL can be used as a default value for a field until a proper value is provided.
- Uninitialized variables: In programming, NULL can be used to indicate that a variable has not been assigned a value yet.
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