db.json

{
  "customers": [
    {
      "id": "c1",
      "order_id": [
        1,
        2
      ]
    },
    {
      "id": "c2",
      "order_id": [
        3,
        4
      ]
    },
    {
      "id": "c3",
      "order_id": [
        5
      ]
    }
  ],
  "orders": [
    {
      "id": 1,
      "order_total": 40.77,
      "purchased_at": "retail_me",
      "order_crated_date": "2021-03-07T11:23:55.667Z",
      "order_lines": [
        {
          "item_id": "i-123",
          "item_description": "hammer",
          "item_qty": 4,
          "item_price": 77.89
        }
      ]
    },
    {
      "id": 2,
      "order_total": 99.77,
      "purchased_at": "amaze",
      "order_crated_date": "2021-03-06T11:23:55.667Z",
      "order_lines": [
        {
          "item_id": "i-444",
          "item_description": "paint",
          "item_qty": 2,
          "item_price": 55.32
        }
      ]
    },
    {
      "id": 3,
      "order_total": 66.77,
      "purchased_at": "colds",
      "order_crated_date": "2021-03-21T11:23:55.667Z",
      "order_lines": [
        {
          "item_id": "i-666",
          "item_description": "door",
          "item_qty": 2,
          "item_price": 1155.32
        }
      ]
    },
    {
      "id": 4,
      "order_total": 66.77,
      "purchased_at": "colds",
      "order_crated_date": "2021-03-21T11:23:55.667Z",
      "order_lines": [
        {
          "item_id": "i-666",
          "item_description": "door",
          "item_qty": 2,
          "item_price": 1155.32
        }
      ]
    },
    {
      "id": 5,
      "order_total": 66.77,
      "purchased_at": "colds",
      "order_crated_date": "2021-03-21T11:23:55.667Z",
      "order_lines": [
        {
          "item_id": "i-666",
          "item_description": "door",
          "item_qty": 2,
          "item_price": 1155.32
        }
      ]
    }
  ]
}