firebase data retrieval i am not able to retrieve data from the json created in the firebase data base

this is my data base structure

{
  "main" : {
    "fake data1" : {
      "abc" : "1001",
      "high" : "100",
      "low" : "150",
      "mid" : "200",
      "name" : "fake data1"
    },
    "fake data2" : {
      "abc" : "1023",
      "high" : "1020",
      "low" : "1020",
      "mid" : "1501",
      "name" : "fake data2"
    },
    "fake data3" : {
      "abc" : "1001",
      "high" : "100",
      "low" : "150",
      "mid" : "200",
      "name" : "fake data3"
    },
    "fake data4" : {
      "abc" : "1023",
      "high" : "1020",
      "low" : "1020",
      "mid" : "1501",
      "name" : "fake data4"
    },
    "fake data5" : {
      "abc" : "1001",
      "high" : "100",
      "low" : "150",
      "mid" : "200",
      "name" : "fake data5"
    },
    "fake data6" : {
      "abc" : "1023",
      "high" : "1020",
      "low" : "1020",
      "mid" : "1501",
      "name" : "fake data6"
    }
  }
}

i wanna retrieve all names from the above but i am not able to retrive it i have tried all the query i can i am new to firebase please guide me i am trying the following query but not getting

//

data retrive
   var datafire =firebase.database().ref();
   var namedb = datafire.child('main')
   var querry = namedb.orderByChild('name')
   querry.on("value",function(datasnap){

    var data=(datasnap.val());
    console.log(data.name);