retrieve record position

[Tony David]

I would like to now if there's any way through mysql to retrieve the position
of a specific record in a query.

My question might be a little confusing but let me explain through an example
Take following example table

ID Name Datum
1 Pierre 2007/07/07
2 Paul 2007/07/06
3 Rubens 2007/07/04
4 Paul 2007/07/05
5 Pattrick 2007/07/17

with following sql
SELECT * order by datum desc

Obviously this the result
5 Pattrick 2007/07/17
1 Pierre 2007/07/07
2 Paul 2007/07/06
4 Paul 2007/07/05
3 Rubens 2007/07/04

What i want to know now is which row,for instance, the name Paul would be found in that result

in this example it would be row 3 and 4

Hope i explained this well enough.
Thanks in advance