VAR
Returns the statistical variance of all values in the given expression.
Syntax
VAR ( expression )
Arguments
expression
Is an expression of the exact numeric or approximate numeric data type category, except for the bit data type. Aggregate functions and subqueries are not permitted.
Return Types
float
Remarks
If VAR is used on all items in a SELECT statement, each value in the result set is included in the calculation. VAR can be used with numeric columns only. Null values are ignored.
Examples
This example returns the variance for all royalty values in the titles table.
USE pubs
SELECT VAR(royalty)
FROM titles