Python操作MongoDB数据库PyMongo库使用方法

引用PyMongo

>>> import pymongo

创建连接Connection

>>> import pymongo
>>> conn = pymongo.Connection('localhost',27017)

或

>>> from pymongo import Connection
>>> conn = Connection('localhost',27017)

创建Connection时，指定host及port参数

>>> import pymongo

>>> conn = pymongo.Connection(host='127.0.0.1',port=27017)

连接数据库

>>> db = conn.ChatRoom

或

>>> db = conn['ChatRoom']

 
连接聚集

>>> account = db.Account

或

>>> account = db["Account"]

 
查看全部聚集名称

>>> db.collection_names()

 
查看聚集的一条记录

>>> db.Account.find_one()
>>> db.Account.find_one({"UserName":"keyword"})

 

查看聚集的字段

>>> db.Account.find_one({},{"UserName":1,"Email":1})

{u'UserName': u'libing', u'_id': ObjectId('4ded95c3b7780a774a099b7c'), u'Email': u'[e-mail]'}
>>> db.Account.find_one({},{"UserName":1,"Email":1,"_id":0})

{u'UserName': u'libing', u'Email': u'[e-mail]'}

 

查看聚集的多条记录

>>> for item in db.Account.find():

        item
>>> for item in db.Account.find({"UserName":"libing"}):

        item["UserName"]

 
查看聚集的记录统计

>>> db.Account.find().count()
>>> db.Account.find({"UserName":"keyword"}).count()

 

聚集查询结果排序

>>> db.Account.find().sort("UserName")  --默认为升序

>>> db.Account.find().sort("UserName",pymongo.ASCENDING)   --升序

>>> db.Account.find().sort("UserName",pymongo.DESCENDING)  --降序

 

聚集查询结果多列排序

>>> db.Account.find().sort([("UserName",pymongo.ASCENDING),("Email",pymongo.DESCENDING)])

 

添加记录

>>> db.Account.insert({"AccountID":21,"UserName":"libing"})

 

修改记录

>>> db.Account.update({"UserName":"libing"},{"$set":{"Email":"[e-mail]","Password":"123"}})

 

删除记录

>>> db.Account.remove()   -- 全部删除
>>> db.Test.remove({"UserName":"keyword"})