NULL is
A. the same as 0 for integer
B. the same as blank for character
C. the same as 0 for integer and blank for character
D. not a value
Answer: Option D
Solution(By Examveda Team)
NULL in SQL is used to represent missing or unknown data. It is not the same as 0 for integer or blank for character. In fact, NULL is not a specific value, but rather an absence of a value or a placeholder for missing data.So, the correct answer is Option D: not a value.
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Null is a value that is unavailable, unassigned, unknown or inapplicable. Null is not same as zero or a blank space.
Oracle Database Fundamentals I, Volume I, Page 1-14