stdev()（聚合函数）stdev() (aggregation function)

• 09/30/2020
• • o
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将该组作为示例，计算组内 Expr 的标准偏差。Calculates the standard deviation of Expr across the group, considering the group as a sample.

• 使用的公式：Used formula:

• 只能在 summarize 内的聚合上下文中使用Can be used only in context of aggregation inside summarize

语法Syntax

summarize stdev(Expr)summarize stdev(Expr)

参数Arguments

• Expr：用于聚合计算的表达式。Expr : Expression that will be used for aggregation calculation.

返回Returns

组内 Expr 的标准偏差值。The standard deviation value of Expr across the group.

示例Examples

range x from 1 to 5 step 1
| summarize make_list(x), stdev(x)