Q861
Is the following statement is true/false? "An expression can be NULL, but can never equal to NULL"
A.
True
AnswerB.
False
Answer: Option A
Solution
Answer: Option A
Solution:
This question is about how MySQL handles the special value NULL, which represents the absence of a value.The statement says "An expression can be NULL, but can never equal to NULL". Let's break it down:
* "An expression can be NULL": This part is true. Many operations in MySQL can result in a NULL value. For example, if you try to divide a number by zero, the result will be NULL.
* "Can never equal to NULL": This part is false. In MySQL, you cannot directly compare values using the '=' operator with NULL. This is because NULL represents the absence of a value, so it's not possible to say definitively whether a value is equal to it.
Therefore, the correct answer is Option B: False.