STDDEV_SAMP

description

Syntax

STDDEV_SAMP(expr)

返回expr表达式的样本标准差

example

1. MySQL > select stddev_samp(scan_rows) from log_statis group by datetime;
2. +--------------------------+
3. | stddev_samp(`scan_rows`) |
4. +--------------------------+
5. |        2.372044195280762 |
6. +--------------------------+

keywords

STDDEV_SAMP,STDDEV,SAMP