如何在MongoDB中实现范围操作

“$in”：在范围内
“$nin”：不再在范围内

示例：查询姓名“赵毅”和“王霸” " "信息
> db.emp.find({"name":{"$in":["赵毅","王霸"]}}).pretty();
{< br />                                                                                                                                                                                /> "sal" : 1000,
"loc" : "北京"
}
{
"_id" : ObjectId("599108433268c8e84253be2d"),
"name" : "私生子",
  "sex" : "男",
"age" : 35,
"sal" : 8000,
"loc" : "北京"
}

示例：查询姓名不为“赵毅”、“王霸”的信息
> db.emp.find({"name":{" $nin":["赵毅","王霸"]}}).pretty();
{
"_id" : ObjectId("599108423268c8e84253be27"),
"姓名" : "钱二",
"性别" : "女",
  "年龄" : 22,
  "sal" : 5000,
  "loc" : "上海"
}
{
  " _id" : ObjectId("599108423268c8e84253be28 "),
"姓名": "孙三",
"性别": "男",
"年龄": 40,
"萨尔": 2000,< br/> />        "loc" : "深圳"
}
{
    "_id" : ObjectId("599108423268c8e84253be29"),
"name" : "李思",
"sex" : "女",
"age" : 30,
"sal" : 7000,
"loc" : "北京"
}
{
“_id” : ObjectId("599108423268c8e84253be2a"),
"姓名" : "星期五",
"性别" : "女",
"年龄" : 30,< br/> "sal" : 6400,
"loc" : "北京"
}
{
"_id" : ObjectId("599108423268c8e84253be2b"),
" name" : "吴刘" ,
          "性别" : "男",
      "年龄" : 30,
      "sal" : 2500,
       "loc" : "重庆"
}< br/>{
“_id” : ObjectId("599108423268c8e84253be2c"),
"姓名" : "郑琪",
"性别" : "女" ,
"age" : 50,
" sal" : 4700,
"loc" : "成都"
}

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