VAR
Returns the statistical variance of all values in the specified expression. May be followed by the OVER clause.
Syntax
VAR ( [ ALL | DISTINCT ] expression ) OVER ( [ partition_by_clause ] order_by_clause )
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
Examples
SELECT VAR([IntNotNullColumn]) AS [Var] FROM [IntTable]