COVAR_SAMP

COVAR_SAMP

Description

Syntax

double covar_samp(x, y)

计算x和y的样本协方差。

example

mysql> select covar_samp(x,y) from baseall;
+---------------------+
| covar_samp(x, y)    |
+---------------------+
| 0.89442719099991586 |
+---------------------+
1 row in set (0.21 sec)

keywords

COVAR_SAMP