Multiple choice technology databases

Arithmetic expressions containing a null value evaluate to null.

  1. True

  2. False
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A Correct answer
Explanation

To solve this question, the user needs to know the concept of null values in arithmetic expressions.

The correct answer is:

The Answer is: B

Explanation:

The statement is false. Arithmetic expressions containing a null value do not evaluate to null. In most programming languages, performing arithmetic operations with a null value will result in the entire expression evaluating to null. However, this behavior depends on the programming language and the data type being used. In some cases, arithmetic expressions with null values may result in a runtime error or undefined behavior.

AI explanation

The statement is True. In SQL, NULL represents an unknown value, so any arithmetic operation (addition, subtraction, multiplication, division) involving a NULL operand propagates that unknown-ness and the whole expression evaluates to NULL. For example, 10 + NULL, NULL * 5, and NULL - NULL all return NULL, never a numeric value or zero.

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