插入 测试数据
for(var j=1;j<3;j++){ for(var i=1;i<3;i++){ var person={ Name:"jack"+i, Age:i, Address:["henan","wuhan"], Course:[ {Name:"shuxue",Score:i}, {Name:"wuli",Score:i} ] } db.DemoTest.Person.insert(person) } }
Count
db.DemoTest.Person.count({Name:"jack1"})
返回数量
distinct
db.DemoTest.Person.distinct("Name")
返回不重复的Name值。
group
例子：按照Name分组，条件是Age大于46
db.DemoTest.Person.group({ "key":{"Name":true}, -----分组的keky "initial":{"Person":[]},-------每组分享的一个”初始化函数“ "$reduce":function(cur,prev){ ------这个函数的第一个参数是当前的文档对象，第二个参数是上一次function操作的累计对象，第一次为initial中的{”person“：[]}。有多少个文档， $reduce就会调用多少次
prev.Person.push(cur);
}, "finalize":function(prev){ ---返回每组的数量 prev.count=prev.Person.length; }, "condition":{"Age":{"$lt":46}} -----过滤条件 })
返回结果如下：
/* 0 */ { "0" : { "Name" : "jack1", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9d6"), "Name" : "jack1", "Age" : 1, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 1 }, { "Name" : "wuli", "Score" : 1 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba07"), "Name" : "jack1", "Age" : 1, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 1 }, { "Name" : "wuli", "Score" : 1 } ] } ], "count" : 2 }, "1" : { "Name" : "jack2", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9d7"), "Name" : "jack2", "Age" : 2, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 2 }, { "Name" : "wuli", "Score" : 2 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba08"), "Name" : "jack2", "Age" : 2, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 2 }, { "Name" : "wuli", "Score" : 2 } ] } ], "count" : 2 }, "2" : { "Name" : "jack3", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9d8"), "Name" : "jack3", "Age" : 3, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 3 }, { "Name" : "wuli", "Score" : 3 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba09"), "Name" : "jack3", "Age" : 3, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 3 }, { "Name" : "wuli", "Score" : 3 } ] } ], "count" : 2 }, "3" : { "Name" : "jack4", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9d9"), "Name" : "jack4", "Age" : 4, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 4 }, { "Name" : "wuli", "Score" : 4 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba0a"), "Name" : "jack4", "Age" : 4, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 4 }, { "Name" : "wuli", "Score" : 4 } ] } ], "count" : 2 }, "4" : { "Name" : "jack5", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9da"), "Name" : "jack5", "Age" : 5, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 5 }, { "Name" : "wuli", "Score" : 5 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba0b"), "Name" : "jack5", "Age" : 5, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 5 }, { "Name" : "wuli", "Score" : 5 } ] } ], "count" : 2 }, "5" : { "Name" : "jack6", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9db"), "Name" : "jack6", "Age" : 6, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 6 }, { "Name" : "wuli", "Score" : 6 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba0c"), "Name" : "jack6", "Age" : 6, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 6 }, { "Name" : "wuli", "Score" : 6 } ] } ], "count" : 2 }, "6" : { "Name" : "jack7", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9dc"), "Name" : "jack7", "Age" : 7, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 7 }, { "Name" : "wuli", "Score" : 7 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba0d"), "Name" : "jack7", "Age" : 7, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 7 }, { "Name" : "wuli", "Score" : 7 } ] } ], "count" : 2 }, "7" : { "Name" : "jack8", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9dd"), "Name" : "jack8", "Age" : 8, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 8 }, { "Name" : "wuli", "Score" : 8 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba0e"), "Name" : "jack8", "Age" : 8, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 8 }, { "Name" : "wuli", "Score" : 8 } ] } ], "count" : 2 }, "8" : { "Name" : "jack9", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9de"), "Name" : "jack9", "Age" : 9, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 9 }, { "Name" : "wuli", "Score" : 9 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba0f"), "Name" : "jack9", "Age" : 9, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 9 }, { "Name" : "wuli", "Score" : 9 } ] } ], "count" : 2 }, "9" : { "Name" : "jack10", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9df"), "Name" : "jack10", "Age" : 10, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 10 }, { "Name" : "wuli", "Score" : 10 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba10"), "Name" : "jack10", "Age" : 10, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 10 }, { "Name" : "wuli", "Score" : 10 } ] } ], "count" : 2 }, "10" : { "Name" : "jack11", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e0"), "Name" : "jack11", "Age" : 11, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 11 }, { "Name" : "wuli", "Score" : 11 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba11"), "Name" : "jack11", "Age" : 11, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 11 }, { "Name" : "wuli", "Score" : 11 } ] } ], "count" : 2 }, "11" : { "Name" : "jack12", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e1"), "Name" : "jack12", "Age" : 12, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 12 }, { "Name" : "wuli", "Score" : 12 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba12"), "Name" : "jack12", "Age" : 12, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 12 }, { "Name" : "wuli", "Score" : 12 } ] } ], "count" : 2 }, "12" : { "Name" : "jack13", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e2"), "Name" : "jack13", "Age" : 13, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 13 }, { "Name" : "wuli", "Score" : 13 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba13"), "Name" : "jack13", "Age" : 13, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 13 }, { "Name" : "wuli", "Score" : 13 } ] } ], "count" : 2 }, "13" : { "Name" : "jack14", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e3"), "Name" : "jack14", "Age" : 14, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 14 }, { "Name" : "wuli", "Score" : 14 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba14"), "Name" : "jack14", "Age" : 14, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 14 }, { "Name" : "wuli", "Score" : 14 } ] } ], "count" : 2 }, "14" : { "Name" : "jack15", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e4"), "Name" : "jack15", "Age" : 15, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 15 }, { "Name" : "wuli", "Score" : 15 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba15"), "Name" : "jack15", "Age" : 15, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 15 }, { "Name" : "wuli", "Score" : 15 } ] } ], "count" : 2 }, "15" : { "Name" : "jack16", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e5"), "Name" : "jack16", "Age" : 16, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 16 }, { "Name" : "wuli", "Score" : 16 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba16"), "Name" : "jack16", "Age" : 16, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 16 }, { "Name" : "wuli", "Score" : 16 } ] } ], "count" : 2 }, "16" : { "Name" : "jack17", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e6"), "Name" : "jack17", "Age" : 17, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 17 }, { "Name" : "wuli", "Score" : 17 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba17"), "Name" : "jack17", "Age" : 17, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 17 }, { "Name" : "wuli", "Score" : 17 } ] } ], "count" : 2 }, "17" : { "Name" : "jack18", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e7"), "Name" : "jack18", "Age" : 18, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 18 }, { "Name" : "wuli", "Score" : 18 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba18"), "Name" : "jack18", "Age" : 18, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 18 }, { "Name" : "wuli", "Score" : 18 } ] } ], "count" : 2 }, "18" : { "Name" : "jack19", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e8"), "Name" : "jack19", "Age" : 19, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 19 }, { "Name" : "wuli", "Score" : 19 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba19"), "Name" : "jack19", "Age" : 19, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 19 }, { "Name" : "wuli", "Score" : 19 } ] } ], "count" : 2 }, "19" : { "Name" : "jack20", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9e9"), "Name" : "jack20", "Age" : 20, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 20 }, { "Name" : "wuli", "Score" : 20 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba1a"), "Name" : "jack20", "Age" : 20, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 20 }, { "Name" : "wuli", "Score" : 20 } ] } ], "count" : 2 }, "20" : { "Name" : "jack21", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9ea"), "Name" : "jack21", "Age" : 21, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 21 }, { "Name" : "wuli", "Score" : 21 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba1b"), "Name" : "jack21", "Age" : 21, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 21 }, { "Name" : "wuli", "Score" : 21 } ] } ], "count" : 2 }, "21" : { "Name" : "jack22", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9eb"), "Name" : "jack22", "Age" : 22, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 22 }, { "Name" : "wuli", "Score" : 22 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba1c"), "Name" : "jack22", "Age" : 22, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 22 }, { "Name" : "wuli", "Score" : 22 } ] } ], "count" : 2 }, "22" : { "Name" : "jack23", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9ec"), "Name" : "jack23", "Age" : 23, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 23 }, { "Name" : "wuli", "Score" : 23 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba1d"), "Name" : "jack23", "Age" : 23, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 23 }, { "Name" : "wuli", "Score" : 23 } ] } ], "count" : 2 }, "23" : { "Name" : "jack24", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9ed"), "Name" : "jack24", "Age" : 24, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 24 }, { "Name" : "wuli", "Score" : 24 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba1e"), "Name" : "jack24", "Age" : 24, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 24 }, { "Name" : "wuli", "Score" : 24 } ] } ], "count" : 2 }, "24" : { "Name" : "jack25", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9ee"), "Name" : "jack25", "Age" : 25, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 25 }, { "Name" : "wuli", "Score" : 25 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba1f"), "Name" : "jack25", "Age" : 25, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 25 }, { "Name" : "wuli", "Score" : 25 } ] } ], "count" : 2 }, "25" : { "Name" : "jack26", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9ef"), "Name" : "jack26", "Age" : 26, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 26 }, { "Name" : "wuli", "Score" : 26 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba20"), "Name" : "jack26", "Age" : 26, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 26 }, { "Name" : "wuli", "Score" : 26 } ] } ], "count" : 2 }, "26" : { "Name" : "jack27", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f0"), "Name" : "jack27", "Age" : 27, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 27 }, { "Name" : "wuli", "Score" : 27 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba21"), "Name" : "jack27", "Age" : 27, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 27 }, { "Name" : "wuli", "Score" : 27 } ] } ], "count" : 2 }, "27" : { "Name" : "jack28", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f1"), "Name" : "jack28", "Age" : 28, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 28 }, { "Name" : "wuli", "Score" : 28 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba22"), "Name" : "jack28", "Age" : 28, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 28 }, { "Name" : "wuli", "Score" : 28 } ] } ], "count" : 2 }, "28" : { "Name" : "jack29", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f2"), "Name" : "jack29", "Age" : 29, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 29 }, { "Name" : "wuli", "Score" : 29 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba23"), "Name" : "jack29", "Age" : 29, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 29 }, { "Name" : "wuli", "Score" : 29 } ] } ], "count" : 2 }, "29" : { "Name" : "jack30", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f3"), "Name" : "jack30", "Age" : 30, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 30 }, { "Name" : "wuli", "Score" : 30 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba24"), "Name" : "jack30", "Age" : 30, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 30 }, { "Name" : "wuli", "Score" : 30 } ] } ], "count" : 2 }, "30" : { "Name" : "jack31", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f4"), "Name" : "jack31", "Age" : 31, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 31 }, { "Name" : "wuli", "Score" : 31 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba25"), "Name" : "jack31", "Age" : 31, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 31 }, { "Name" : "wuli", "Score" : 31 } ] } ], "count" : 2 }, "31" : { "Name" : "jack32", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f5"), "Name" : "jack32", "Age" : 32, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 32 }, { "Name" : "wuli", "Score" : 32 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba26"), "Name" : "jack32", "Age" : 32, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 32 }, { "Name" : "wuli", "Score" : 32 } ] } ], "count" : 2 }, "32" : { "Name" : "jack33", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f6"), "Name" : "jack33", "Age" : 33, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 33 }, { "Name" : "wuli", "Score" : 33 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba27"), "Name" : "jack33", "Age" : 33, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 33 }, { "Name" : "wuli", "Score" : 33 } ] } ], "count" : 2 }, "33" : { "Name" : "jack34", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f7"), "Name" : "jack34", "Age" : 34, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 34 }, { "Name" : "wuli", "Score" : 34 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba28"), "Name" : "jack34", "Age" : 34, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 34 }, { "Name" : "wuli", "Score" : 34 } ] } ], "count" : 2 }, "34" : { "Name" : "jack35", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f8"), "Name" : "jack35", "Age" : 35, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 35 }, { "Name" : "wuli", "Score" : 35 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba29"), "Name" : "jack35", "Age" : 35, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 35 }, { "Name" : "wuli", "Score" : 35 } ] } ], "count" : 2 }, "35" : { "Name" : "jack36", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9f9"), "Name" : "jack36", "Age" : 36, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 36 }, { "Name" : "wuli", "Score" : 36 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba2a"), "Name" : "jack36", "Age" : 36, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 36 }, { "Name" : "wuli", "Score" : 36 } ] } ], "count" : 2 }, "36" : { "Name" : "jack37", "Person" : [ { "_id" : ObjectId("54461dce69f872cf5ea2b9fa"), "Name" : "jack37", "Age" : 37, "Address" : [ "henan", "wuhan" ], "Course" : [ { "Name" : "shuxue", "Score" : 37 }, { "Name" : "wuli", "Score" : 37 } ] }, { "_id" : ObjectId("54461dce69f872cf5ea2ba2b"), "Name" : "jack37", "Age" : 37, 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