TopSum
Returns, in order of decreasing rank, the top-most rows of a table whose cumulative total is at least a specified value.
Syntax
TopSum(<table expression>, <rank expression>, <sum>)
Applies To
An expression that returns a table, such as a <table column reference>, or a function that returns a table.
Return Type
<table expression>
Remarks
The TopSum function returns the top-most rows in decreasing order of rank based on the evaluated value of the <rank expression> argument for each row, such that the sum of the <rank expression> values is at least the given total that is specified by the <sum> argument. TopSum returns the smallest number of elements possible while still meeting the specified sum value.
Examples
For example, assume that a table column named Products contains the following data:
| Product name | Unit sales |
|---|---|
Apples |
1200 |
Kiwi fruit |
500 |
Oranges |
1500 |
Lemons |
750 |
In this example, the following function:
TopSum([Products], [Unit Sales], 2500)
returns the following table:
| Product name | Unit sales |
|---|---|
Oranges |
1500 |
Apples |
1200 |
See Also
Reference
Data Mining Extensions (DMX) Function Reference
Functions (DMX)
Mapping Functions to Query Types (DMX)