STDDEV_SAMP

Description

Syntax

STDDEV SAMP (expr)

Returns the sample standard deviation of the expr expression

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. +--------------------------+

keyword

STDDEV SAMP,STDDEV,SAMP