REGR_SXY

Description

Syntax

double regr_sxy(y, x)

x, y support basic numeric types.

calculate the sum of the products of deviations of two variables, X and Y, from their respective means

EXAMPLE

We have the following data

mysql> select * from t;
+------+------+------+
| id   | x    | y    |
+------+------+------+
|    2 |   14 |   27 |
|    4 |   10 |   20 |
|    3 |    5 |    7 |
|    1 |   18 |   13 |
+------+------+------+

mysql> select regr_sxy(y,x) from t;
+----------------+
| regr_sxy(y, x) |
+----------------+
|          59.75 |
+----------------+

KEYWORDS

REGR_SXY