SQL server定义一个函数,给定10个数值,返回该组数据的统计量。
时间: 2023-11-27 19:51:33 浏览: 27
可以使用 SQL Server 内置的聚合函数来实现这个目标,例如:
```
CREATE FUNCTION GetStatistics
(
@Value1 DECIMAL(18, 2),
@Value2 DECIMAL(18, 2),
@Value3 DECIMAL(18, 2),
@Value4 DECIMAL(18, 2),
@Value5 DECIMAL(18, 2),
@Value6 DECIMAL(18, 2),
@Value7 DECIMAL(18, 2),
@Value8 DECIMAL(18, 2),
@Value9 DECIMAL(18, 2),
@Value10 DECIMAL(18, 2)
)
RETURNS TABLE
AS
RETURN
(
SELECT
AVG(Value) AS Average,
MIN(Value) AS Minimum,
MAX(Value) AS Maximum,
STDEV(Value) AS StandardDeviation
FROM
(VALUES
(@Value1),
(@Value2),
(@Value3),
(@Value4),
(@Value5),
(@Value6),
(@Value7),
(@Value8),
(@Value9),
(@Value10)
) AS ValuesTable(Value)
)
```
这个函数的参数是 10 个数值,返回一个包含平均值、最小值、最大值和标准差的表格。可以通过以下语句调用该函数:
```
SELECT * FROM GetStatistics(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
```