Uses for NULL
suggest change- Data not yet known - such as
end_date
,rating
- Optional data - such as
middle_initial
(though that might be better as the empty string) - 0/0 - The result of certain computations, such as zero divided by zero.
- NULL is not equal to “” (blank string) or 0 (in case of integer).
- others?
Found a mistake? Have a question or improvement idea?
Let me know.
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