COUNT

クエリ条件に一致する行の数を返します。

SELECT COUNT(*) FROM Customer WHERE Address = 'CustomerAddress'

COUNT(DISTINCT)

クエリ条件に一致する、null 以外の個別のフィールド値の数を返します。

SELECT COUNT(DISTINCT Name) AS DistinctValues FROM Customer WHERE Address = 'CustomerAddress'

AVG

カラムの値の平均を返します。

SELECT Address, AVG(AnnualRevenue) FROM Customer WHERE Address = 'CustomerAddress'  GROUP BY Address

MIN

カラムの値の最小値を返します。

SELECT MIN(AnnualRevenue), Address FROM Customer WHERE Address = 'CustomerAddress' GROUP BY Address

MAX

カラムの値の最大値を返します。

SELECT Address, MAX(AnnualRevenue) FROM Customer WHERE Address = 'CustomerAddress' GROUP BY Address

SUM

カラムの値の合計を返します。

SELECT SUM(AnnualRevenue) FROM Customer WHERE Address = 'CustomerAddress'