Description  | The   | 
Syntax  | SUM(  | 
Output  | numeric  | 
Variables
number: the numeric field to be summed.
Example
SUM(Value) Over (Partition by Group)
ID  | Group  | Value  | SUM  | 
1  | A  | 10  | 45  | 
2  | A  | 20  | 45  | 
3  | A  | 15  | 45  | 
4  | B  | 30  | 70  | 
5  | B  | 40  | 70  | 
Calculates the total sum of a specified numeric field within a range or partition
Description  | The   | 
Syntax  | SUM(  | 
Output  | numeric  | 
number: the numeric field to be summed.
SUM(Value) Over (Partition by Group)
ID  | Group  | Value  | SUM  | 
1  | A  | 10  | 45  | 
2  | A  | 20  | 45  | 
3  | A  | 15  | 45  | 
4  | B  | 30  | 70  | 
5  | B  | 40  | 70  |