VAR_SAMP,VARIANCE_SAMP

VAR_SAMP,VARIANCE_SAMP

描述

语法

VAR_SAMP(expr)

返回expr表达式的样本方差

举例

MySQL > select var_samp(scan_rows) from log_statis group by datetime;
+-----------------------+
| var_samp(`scan_rows`) |
+-----------------------+
|    5.6227132145741789 |
+-----------------------+

keywords

VAR_SAMP,VARIANCE_SAMP,VAR,SAMP,VARIANCE