XLeratorDB/math Documentation
COMBIN
Updated: 17 August 2010
Use COMBIN to calculate the number of combinations for a given number of items.
Syntax
SELECT [westclintech].[wct].[COMBIN] (
<@Number, float,>
,<@Number_chosen, float,>)
Arguments
@Number
the number of items. @Number is an expression of type float or of a type that can be implicitly converted to float.
@Number_chosen
the number of items in each combination. @Number_chosen is an expression of type float or of a type that can be implicitly converted to float.
Return Types
float
Remarks
· @Number and @Number_chosen are truncated to integers
· @Number and @Number_chosen must be greater than zero
· COMBIN = FACT(@Number) / (FACT(@Number - @Number_chosen) * FACT(@Number_chosen))
Example
SELECT wct.COMBIN(52,5)
Here is the result set
----------------------
2598960
(1 row(s) affected)