How to get column in a table depending on the selections of a list box?

[#1]

Hello all

I need to calculate a table, and one column depends on the selection of a list of values that are summarized as a new column; the values that are not selected, should be visualized as extra columns at the same level:

My data:

Runner	Act	times
Runner1	1km	1
Runner1	5km	2
Runner2	20km	2
Runner3	5km	1
Runner3	1km	3
Runner2	5km	2
Runner2	3km	3
Runner1	3km	2

The field tha the end user uses todefine the field "Long distance"

Long distance

1km

5km

20km

The resulting table, when end user selects in "long distance" field the value 5km and 20 km

	Long Distance	1km	3km
Runner1	2	1	2
Runner2	4	0	3
Runner3	1	3	0