VAR

Transact-SQL Reference

Transact-SQL Reference

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

See Also

Aggregate Functions