Aggregation Functions

Aggregate functions perform a calculation on a set of values and return a single value.

COUNT(col)
COUNT(*)

Return the number of rows. When col is specified, the count returned will be the number of rows. When * is specified, the count returned will be the total number of rows.

AVG(col)

Return the average value of a given column.

SUM(col)

Return the sum value of a given column.

MAX(col)

Return the max value of a given column.

MIN(col)

Return the min value of a given column.

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