A data analyst queries a table of daily transactions for multiple product lines. The manager wants a figure that combines daily revenue amounts by product line. Which aggregator function should the analyst use to produce that figure?
SUM()
AGGREGATE()
COUNT()
AVG()
Adding the revenue amounts for each product line is done with a function that sums numeric values. SUM() adds the daily amounts into a single value. AGGREGATE() is not a function in SQL. COUNT() returns how many rows are in the result set. AVG() computes an average of the daily values. To get a combined number that includes revenue amounts, SUM() is best.
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