Question

Differentiate between SUM() and COUNT().​

Answer 1

Explanation:

In general, use COUNT() when you want to count how many rows contain a non-empty value for a specified column. Use SUM() when you want to get the total sum of all values in a column.

Answer 2

Answer:

Very simply, SUM calculates a total for a number of cells or values, so it's answering the question: HOW MUCH? Or, WHAT IS THE TOTAL? COUNT tells you HOW MANY cells meet a certain condition.

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