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db.collection.aggregate([{$match:{"instock.warehouse":"A"}},{$addFields:{instockCheck:{$filter:{input:"$instock",as:"each",cond:{$and:[{$gt:[{$toInt:"$$each.qty"},2]},{$eq:["$$each.warehouse","A"]}]}}}}},{$match:{instockCheck:{$gt:[]}}},{$project:{instockCheck:0,_id:0}}])