COVAR_SAMP

Description

Syntax

double covar_samp(x, y)

计算x和y的样本协方差。

example

1. mysql> select covar_samp(x,y) from baseall;
2. +---------------------+
3. | covar_samp(x, y)    |
4. +---------------------+
5. | 0.89442719099991586 |
6. +---------------------+
7. 1 row in set (0.21 sec)

keywords

COVAR_SAMP