{
"lambeosaurus": {
"height" : 2.1,
"length" : 12.5,
"weight": 5000
},
"stegosaurus": {
"height" : 4,
"length" : 9,
"weight" : 2500
}
"pegosaurus": {
"height" : 4,
"length" : 9,
"weight" : 1000
}
}
我必须对这种高度为4且长度为9的恐龙结构应用查询。如何在firebase上应用多个查询?(使用orderByChild)