Select spesific records out of database - in range of the count.. does that even make sense

Ok I have a database… sometimes 100 … sometimes 3000 records.
Once in a while i need to display records in a repeat… say records 10 - 20 only… or 63 - 70…

Think my brain is overworked and not thinking logically about this… We have all been there… please could you give me a solution for this…

I have tried the … option where you select the Top 30 records and then minus the say first 20 … but i dont think this is how that work… im sure there is a very simple solution to this…

<div dmx-repeat:repeat1="((lotsdataview.data.top(10))"> </div> <!-- 1 - 10 ?? -->

or

<div dmx-repeat:repeat1="((lotsdataview.data.top(20)) - (lotsdataview.data.top(10)))"> </div> <!-- 11 - 10 ?? -->

or

<div dmx-repeat:repeat1="((lotsdataview.data.top(30)) - (lotsdataview.data.top(20)))"> </div> <!-- 21 - 30 ?? -->