SQL - delete with ... select by two fields?

Hi guys

I have File with many fields i.e. doc_nr, batch_nr, amount and other. (pair
doc_nr and batch_nr are unique)
Then I create select statement:

select doc_nr, batch_nr from File
group by doc_nr, batch_nr
having sum(amount)=0

which take all records with sum of amount = 0 for pair: doc_nr and batch_nr.

But how I should create DELETE statement which do it for the same
parameters.

example

File

doc_nr batch_nr amount
1 1 100
1 1 -100
1 2 100
1 2 -120
3 4 100


select take records
doc_nr batch_nr amount
1 1 100
1 1 -100

and this records should be deleted so file after delete should contain only
doc_nr batch_nr amount
1 2 100
1 2 -120
3 4 100

Have you any idea?

Regards

Tomek