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doris/docs/documentation/cn/sql-reference/sql-functions/aggregate-functions/stddev_samp.md
2019-07-11 16:45:45 +08:00

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STDDEV_SAMP

Syntax

STDDEV_SAMP(expr)

Description

返回expr表达式的样本标准差

Examples

MySQL > select stddev_samp(scan_rows) from log_statis group by datetime;
+--------------------------+
| stddev_samp(`scan_rows`) |
+--------------------------+
|        2.372044195280762 |
+--------------------------+