COVAR_POP
Returns the population covariance for a set of expression pairs. The return value is of type DOUBLE PRECISION
. COVAR_POP
eliminates expression pairs where either expression in the pair is NULL
. If no rows remain, the function returns NULL
.
Syntax
SELECT COVAR_POP ( expression1, expression2 )
Parameters
expression1 |
The dependent DOUBLE PRECISION expression
|
expression2 |
The independent DOUBLE PRECISION expression
|
Example
=> SELECT COVAR_POP (Annual_salary, Employee_age) FROM employee_dimension; COVAR_POP ------------------- -9032.34810730019 (1 row)