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MCQ Practice Single Best Answer Topic: Aggregation functions - MySQL

Q Which aggregation function in MySQL returns the total number of non-null values in a column?

Question ID
#15502
Subchapter
Aggregation functions - MySQL
Action
Choose one option below

Choose Your Answer

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  • A AVG ✔ ✖
  • B SUM ✔ ✖
  • C COUNT ✔ ✖
  • D NONNULL ✔ ✖
Correct Answer: C

Explanation

The COUNT function in MySQL, when used without any modifiers, returns the total number of non-null values in a column. It counts all the non-null records in the specified column.

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