SQL: Select "until"
I'm looking for a way to select until a sum is reached. My "documents" table has "tag_id" and "size" fields. I want to select all of the documents with tag_id = 26 but I know I can only handle 600 units of size. So, there's no point in selecting 100 documents and discarding 90 of them when I could have known that the first 10 already ...