STDDEV_SAMP
STDDEV_SAMPβ
Descriptionβ
Syntaxβ
STDDEV SAMP (expr)
Returns the sample standard deviation of the expr expression
exampleβ
MySQL > select stddev_samp(scan_rows) from log_statis group by datetime;
+--------------------------+
| stddev_samp(`scan_rows`) |
+--------------------------+
| 2.372044195280762 |
+--------------------------+
keywordsβ
STDDEV SAMP,STDDEV,SAMP