Returns the sum of all the values, or only the DISTINCT values, in the expression. SUM can be used with numeric columns only. Null values are ignored.


SUM ( [ ALL | DISTINCT ] expression )  
   OVER ( [ partition_by_clause ] order_by_clause )



Is a constant, column, or function, and any combination of arithmetic, bitwise, and string operators. 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

Returns the summation of all expression values in the most precise expression data type. It could be one of bigint, decimal, money, float or int.


SELECT SUM([FloatValue]*[DecimalNullableValue]) AS [Sum] FROM [BasicDataTable]

See Also