Python操作Mongodb数据库的方法小结

from pymongo import MongoClient

conn = MongoClient("localhost")
MongoClient(host='127.0.0.1',port=27017)

db = conn.数据库名称

collection = db[collection_name]

collection = db.collection_name

db.collection_names()

db.user.insert({"name":"夏利刚","age":18,"hobby":"学习"})

db.user.insert([{"name":"夏利刚","age":18,"hobby":"学习"},{"name":"xxxoo","age":48,"hobby":"学习"}]

data.inserted_id
data.inserted_ids

db.user.find()
#带条件的查询
# data = db.user.find({"name":"周日"})
# print(data) #返回result类似一个迭代器 可以使用 next方法 一个一个 的取出来
# print(next(data))  #取出一条数据

db.user.find_one()

db.user.find({"name":"张三"})

from bson.objectid import ObjectId*#用于ID查询
data = db.user.find({"_id":ObjectId("59a2d304b961661b209f8da1")})

{"name":{'$regex':"张"}}

import re {'xxx':re.compile('xxx')}

data = db.user.find({"age":{"$gt":10}}).sort("age",-1) #年龄 升序 查询 pymongo.ASCENDING --升序
data = db.user.find({"age":{"$gt":10}}).sort("age",1) #年龄 降序 查询 pymongo.DESCENDING --降序

db.user.find().limit(3)
data = db.user.find({"age":{"$gt":10}}).sort("age",-1).limit(3)

db.user.find().count()

db.user.find().skip(2)

db.user.update({"name":"张三"},{"$set":{"age":25}})
db.user.update({"name":"张三"},{"$inc":{"age":25}})

​ db.user.update_one({"name":"张三"},{"$set":{"age":99}})

db.user.update_many({"name":"张三"},{"$set":{"age":91}})

print(result.matched_count, result.modified_count)

collection.remove({"name":"lilei"})

collection.remove()

delete_one()即删除第一条符合条件的数据
collection.delete_one({"name":" Kevin"})
delete_many()即删除所有符合条件的数据，返回结果是DeleteResult类型
collection.delete_many({"age": {$lt:25}})

result.deleted_count

conn.close()