Intermediate
SQL
Q61 / 100
What does the "COALESCE(a, b, c)" function return?
Correct! Well done.
Incorrect.
The correct answer is B) The first non-NULL value among a, b, and c
B
Correct Answer
The first non-NULL value among a, b, and c
Explanation
COALESCE evaluates its arguments in order and returns the first one that is not NULL, often used to supply default values.
Progress
61/100