Name

VAR — Returns the variance.

Synopsis

numeric VAR ( in expr any );

Description

VAR (VARIANCE) returns variance of expr. Virtuoso calculates the variance of expr as follows: 0 if the number of rows in expr = 1; VAR_SAMP if the number of rows in expr > 1

Parameters

expr

Number expression.

Return Types

The function returns a value of type NUMERIC. If the function is applied to an empty set, then it returns null.