mongo数据排序和分页显示

数据排序
使用sort()
1 升序
-1 降序
自然排序 数据插入的顺序
$natural

db.stu.drop();
db.stu.insert({"name":"张三","sex":"男","age":,"score":,"address":"河南"});
db.stu.insert({"name":"李四","sex":"女","age":,"score":,"address":"山东"});
db.stu.insert({"name":"王五","sex":"男","age":,"score":,"address":"江苏"});
db.stu.insert({"name":"赵六","sex":"男","age":,"score":,"address":"山东"});
db.stu.insert({"name":"孙七","sex":"女","age":,"score":,"address":"湖北"});
db.stu.insert({"name":"tom","sex":"男","age":,"score":,"address":"海南"});
db.stu.insert({"name":"lucy","sex":"女","age":,"score":,"address":"浙江"});
db.stu.insert({"name":"jack","sex":"男","age":,"score":,"address":"美国"});
db.stu.insert({"name":"smith","sex":"男","age":,"score":,"address":"美国"});

db.stu.find({},{"_id":,"address":});
{ "name" : "张三", "sex" : "男", "age" : , "score" :  }
{ "name" : "李四", "sex" : "女", "age" : , "score" :  }
{ "name" : "王五", "sex" : "男", "age" : , "score" :  }
{ "name" : "赵六", "sex" : "男", "age" : , "score" :  }
{ "name" : "孙七", "sex" : "女", "age" : , "score" :  }
{ "name" : "tom", "sex" : "男", "age" : , "score" :  }
{ "name" : "lucy", "sex" : "女", "age" : , "score" :  }
{ "name" : "jack", "sex" : "男", "age" : , "score" :  }
{ "name" : "smith", "sex" : "男", "age" : , "score" :  }
//自然降序
db.stu.find({},{"_id":,"address":}).sort({"$natural":-})
{ "name" : "smith", "sex" : "男", "age" : , "score" :  }
{ "name" : "jack", "sex" : "男", "age" : , "score" :  }
{ "name" : "lucy", "sex" : "女", "age" : , "score" :  }
{ "name" : "tom", "sex" : "男", "age" : , "score" :  }
{ "name" : "孙七", "sex" : "女", "age" : , "score" :  }
{ "name" : "赵六", "sex" : "男", "age" : , "score" :  }
{ "name" : "王五", "sex" : "男", "age" : , "score" :  }
{ "name" : "李四", "sex" : "女", "age" : , "score" :  }
{ "name" : "张三", "sex" : "男", "age" : , "score" :  }

//age升序
db.stu.find({},{"_id":,"address":}).sort({"age":});
{ "name" : "王五", "sex" : "男", "age" : , "score" :  }
{ "name" : "张三", "sex" : "男", "age" : , "score" :  }
{ "name" : "smith", "sex" : "男", "age" : , "score" :  }
{ "name" : "李四", "sex" : "女", "age" : , "score" :  }
{ "name" : "jack", "sex" : "男", "age" : , "score" :  }
{ "name" : "赵六", "sex" : "男", "age" : , "score" :  }
{ "name" : "lucy", "sex" : "女", "age" : , "score" :  }
{ "name" : "孙七", "sex" : "女", "age" : , "score" :  }
{ "name" : "tom", "sex" : "男", "age" : , "score" :  }
//age升序,score降序  观察jack和李四
db.stu.find({},{"_id":,"address":}).sort({"age":,"score":-});
{ "name" : "王五", "sex" : "男", "age" : , "score" :  }
{ "name" : "张三", "sex" : "男", "age" : , "score" :  }
{ "name" : "smith", "sex" : "男", "age" : , "score" :  }
{ "name" : "jack", "sex" : "男", "age" : , "score" :  }
{ "name" : "李四", "sex" : "女", "age" : , "score" :  }
{ "name" : "赵六", "sex" : "男", "age" : , "score" :  }
{ "name" : "lucy", "sex" : "女", "age" : , "score" :  }
{ "name" : "孙七", "sex" : "女", "age" : , "score" :  }
{ "name" : "tom", "sex" : "男", "age" : , "score" :  }

分页显示
skip(n):表示跨过多少数据行
limit(n):取出的数据行的个数限制

for(var i=;i<;i++){
    db.data.insert({"id":i});
}
db.data.find({},{"_id":})
{ "id" :  }
{ "id" :  }
............
{ "id" :  }
db.data.find({},{"_id":}).skip().limit();
{ "id" :  }
{ "id" :  }
{ "id" :  }
{ "id" :  }
{ "id" :  }
db.data.find({},{"_id":}).skip().limit();
{ "id" :  }
{ "id" :  }
{ "id" :  }
{ "id" :  }
{ "id" :  }