db.json

{
  "employees": [
    {
      "id": "1",
      "name": "Sky"
    },
    {
      "id": "3",
      "name": "lol"
    },
    {
      "id": "2",
      "name": "aaa",
      "salary": "111",
      "department": "IT"
    },
    {
      "id": "4",
      "name": "aaa",
      "salary": "aa",
      "department": "IT"
    },
    {
      "id": "5",
      "name": "aa",
      "salary": "aa",
      "department": "HR"
    },
    {
      "id": "6",
      "name": "aaa",
      "salary": "200",
      "department": "IT"
    },
    {
      "id": "7",
      "name": "aa",
      "salary": "200",
      "department": "IT"
    },
    {
      "id": "8",
      "name": "aaaaaa",
      "salary": "300000",
      "department": "AD"
    },
    {
      "id": "9",
      "name": "tyiot",
      "salary": "3000",
      "department": "AD"
    }
  ]
}