Python：查询文档（MongoDB三）

#!/usr/bin/env python
# coding:UTF-8


"""
@version: python3.x
@author:曹新健
@contact: [email protected]
@software: PyCharm
@file: 2、查询文档.py
@time: 2018/9/23 22:38
"""

import pymongo
from pymongo import MongoClient
from bson.objectid import ObjectId   #用于id查询


#连接服务器
conn = MongoClient("localhost",27017)

#连接数据库
db = conn.mydb

#获取集合
collection = db.student

#查询文档
'''
#查询部分文档
res = collection.find({"age":{"$gt":15}})
for i in res:
    print(i)


#查询全部文档
res = collection.find()
for i in res:
    print(i)


#统计数据
res = collection.find({"age":{"$gt":15}}).count()
print(res)

#根据id查询
res = collection.find({"_id":ObjectId("5ba82fe261bc5c245ce9e149")})
print(res[0])


#排序
#res = collection.find().sort("age")  #升序
res = collection.find().sort("age",pymongo.DESCENDING) #降序
for i in res:
    print(i)
'''

#分页
res = collection.find().skip(5).limit(5)
for i in res:
    print(i)

#断开
conn.close()