Run query on previous result in Freebase - freebase

Question

I would like to run a query on a preselected set of topics in freebase.
Specifically, I'd like to find out how many, out of 1000 movies do not have a Netflix ID.
What I tried:
[{
"type": "/film/film",
"mid": null,
"name": null,
"netflix_id": {
"optional": "forbidden",
"return": "count"
},
"limit": 1000,
"return": "count"
}]
This, of course, returns 1000. What I wanted was, to select 1000 movies
[{
"type": "/film/film",
"mid": null,
"name": null,
"limit": 1000,
}]
and then look for objects without netflix_id within this result.
Can anybody help me with that?
Edit:
What I am actually looking for is a kind of statistic: x out of 1000 movies do not have a netflix_id. What I need for this is to select 1000 movies, and within this set look for movies without netflix_id.
For now, I simply looked for all movies without a netflix_id and divided it by the number of all movies. I posted the question nonetheless because I'd generally like to know how to use sub-queries.

Answer 1

The following MQL query:
[{
"type": "/film/film",
"mid": null,
"name": null,
"netflix_id": {
"optional": "forbidden",
"return": "count"
},
"limit": 1000
}]
... returns up to 1000 films that have no netflix_id property set. In other words, what you had was mostly correct, except for that last "return": "count", which was then aggregating the result to a single count.
Edit
Based on the updated explanation/requirement, you can use the following MQL query:
[{
"type": "/film/film",
"mid": null,
"name": null,
"netflix_id": [],
"limit": 1000
}]
... to list up to 1000 films and, if they have a netflix_id, the associated IDs. You can tell whether there are any IDs present by examining the size of the returned "netflix_id" array.