[{"_id":"1","url":"localhost:8080/path1/","proxy":{"proxy":"196.0.1.1:1500","protocol":"http",},"success":false,},{"_id":"2","url":"localhost:8080/path2/","proxy":{"proxy":"196.0.1.1:1500","protocol":"http",},"success":true,},{"_id":"3","url":"localhost:8080/path3/","proxy":{"proxy":"192.168.255.255:1500","protocol":"http",},"success":true,},{"_id":"4","url":"localhost:8080/path4/","proxy":{"proxy":"192.168.255.255:1500","protocol":"http",},"success":true,}]

db.collection.aggregate([{$group:{_id:{proxy:"$proxy.proxy",success:"$success"},count:{$sum:1}}}])