[{"id":100,"genres":["Comedy","Drama","Romance"],"imdb_id":"tt1022603","overview":"Tom, greeting-card writer and hopeless romantic...","title":"(500) Days of Summer","release_date":"2009-07-17",},{"id":101,"genres":["Comedy","Scifi","Romance"],"imdb_id":"tt1022603","overview":"Tom, greeting-card writer and hopeless romantic...","title":"(500) Days of Summer","release_date":"2009-07-18",},{"id":19913,"genres":["Comedy","Drama","Horror"],"imdb_id":"tt1022603","overview":"Tom, greeting-card writer and hopeless romantic...","title":"(500) Days of Summer","release_date":"2009-07-17",},{"id":19913,"genres":["Horror"],"imdb_id":"tt1022603","overview":"Tom, greeting-card writer and hopeless romantic...","title":"(500) Days of Summer","release_date":"2009-07-18",}]

db.collection.aggregate([{$facet:{results:[{$match:{}}],categories:[{$unwind:"$genres"},{$sortByCount:"$genres"}],release_date:[{$unwind:"$release_date"},{$sortByCount:"$release_date"}]}}])