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STDDEV_SAMP
description
Syntax
STDDEV_SAMP(expr)It returns the sample standard deviation of the expr expression
example
MySQL > select stddev_samp(scan_rows)
from log_statis
group by datetime;
+--------------------------+
| stddev_samp(`scan_rows`) |
+--------------------------+
| 2.372044195280762 |
+--------------------------+keyword
STDDEV_SAMP,STDDEV,SAMP
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