AVG
Returns the average of the values in a group. Null values are ignored.
Syntax
AVG ( [ 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
The return type is determined by the type of the evaluated result of an expression. It could be one of: bigint, decimal, modey, float, int.
Examples
SELECT AVG([MoneyValue]) AS [Avg] FROM [DataTable]
SELECT AVG([FloatValue]) OVER (PARTITION BY [IdNullable] ORDER BY [IntValue]) AS AVGGG FROM [DataTable]