加入弹性搜索

Question

我有两个具有以下结构的文件

Shipment_received : 
    {
    Some  header level detail
    "ItemId" : "I1",
    "Quantity" : Q1
    "Vendor" : "V1"
   }

shipment_Ordered :  {
    Some header level details
    "ItemId" : "I2"
    "Quantity" : Q2
    "Vendor":"V1" 
}

对于给定的供应商，我想查找订单数量和收货数量的平均差异。如何使用弹性搜索来完成？