Aggregate

Aggregate functions operate on values across rows to make calculations such as sum, average, minimum/maximum, and count. These functions take 0 or more rows and produce a single output.

COUNT

Returns the number of rows that match the query criteria.

SELECT COUNT(*) FROM Account WHERE Industry = 'Floppy Disks'

COUNT(DISTINCT)

Returns the number of distinct, non-null field values that match the query criteria.

SELECT COUNT(DISTINCT BillingState) AS DistinctValues FROM Account WHERE Industry = 'Floppy Disks'

AVG

Returns the average of the column values.

SELECT Name, AVG(AnnualRevenue) FROM Account WHERE Industry = 'Floppy Disks'  GROUP BY Name

MIN

Returns the minimum column value.

SELECT MIN(AnnualRevenue), Name FROM Account WHERE Industry = 'Floppy Disks' GROUP BY Name

MAX

Returns the maximum column value.

SELECT Name, MAX(AnnualRevenue) FROM Account WHERE Industry = 'Floppy Disks' GROUP BY Name

SUM

Returns the total sum of the column values.

SELECT SUM(AnnualRevenue) FROM Account WHERE Industry = 'Floppy Disks'