How to get Datablock only with ID

[Josef Oberstadt]

I get an ID from a table.
Now I will get then nummer of this data in a new query.

I need the number for implement this in my lazyloading.
I use the limit statement.

for excample:
I get the ID from an adresse
Then I start a query with order by name on the adressetable
From this query I will get the position of the ID, in the selection with the order by name.

So I can integrate it in my limit process