Shulou(Shulou.com)05/31 Report--

MongoDB中怎么实现范围运算，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。

"$in"：在范围之中

"$nin"：不再范围之中

范例：查询姓名为"赵一"、"王八"的信息

> db.emp.find({"name":{"$in":["赵一","王八"]}}).pretty();

{

"_id" : ObjectId("599108423268c8e84253be26"),

"name" : "赵一",

"sex" : "男",

"age" : 30,

"sal" : 1000,

"loc" : "北京"

}

{

"_id" : ObjectId("599108433268c8e84253be2d"),

"name" : "王八",

"sex" : "男",

"age" : 35,

"sal" : 8000,

"loc" : "北京"

}

范例：查询姓名不是"赵一"、"王八"的信息

> db.emp.find({"name":{"$nin":["赵一","王八"]}}).pretty();

{

"_id" : ObjectId("599108423268c8e84253be27"),

"name" : "钱二",

"sex" : "女",

"age" : 22,

"sal" : 5000,

"loc" : "上海"

}

{

"_id" : ObjectId("599108423268c8e84253be28"),

"name" : "孙三",

"sex" : "男",

"age" : 40,

"sal" : 2000,

"loc" : "深圳"

}

{

"_id" : ObjectId("599108423268c8e84253be29"),

"name" : "李四",

"sex" : "女",

"age" : 30,

"sal" : 7000,

"loc" : "北京"

}

{

"_id" : ObjectId("599108423268c8e84253be2a"),

"name" : "周五",

"sex" : "女",

"age" : 30,

"sal" : 6400,

"loc" : "北京"

}

{

"_id" : ObjectId("599108423268c8e84253be2b"),

"name" : "吴六",

"sex" : "男",

"age" : 30,

"sal" : 2500,

"loc" : "重庆"

}

{

"_id" : ObjectId("599108423268c8e84253be2c"),

"name" : "郑七",

"sex" : "女",

"age" : 50,

"sal" : 4700,

"loc" : "成都"

}

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