COUNT

クエリ条件に一致する行の数を返します。

SELECT COUNT(*) FROM [CData].[Employee Management].Leave_Types WHERE Leave_Type = 'Sick'

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 ID) AS DistinctValues FROM [CData].[Employee Management].Leave_Types WHERE Leave_Type = 'Sick'

AVG

カラムの値の平均を返します。

SELECT Leave_Type, AVG(AnnualRevenue) FROM [CData].[Employee Management].Leave_Types WHERE Leave_Type = 'Sick'  GROUP BY Leave_Type

MIN

カラムの値の最小値を返します。

SELECT MIN(AnnualRevenue), Leave_Type FROM [CData].[Employee Management].Leave_Types WHERE Leave_Type = 'Sick' GROUP BY Leave_Type

MAX

カラムの値の最大値を返します。

SELECT Leave_Type, MAX(AnnualRevenue) FROM [CData].[Employee Management].Leave_Types WHERE Leave_Type = 'Sick' GROUP BY Leave_Type

SUM

カラムの値の合計を返します。

SELECT SUM(AnnualRevenue) FROM [CData].[Employee Management].Leave_Types WHERE Leave_Type = 'Sick'