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 = "localhost", 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'libing@35.cn'}
{u'UserName': u'libing', u'_id': ObjectId('4ded95c3b7780a774a099b7c'), u'Email': u'libing@35.cn'}
>>> db.Account.find_one({},{"UserName":1,"Email":1,"_id":0})
{u'UserName': u'libing', u'Email': u'libing@35.cn'}
{u'UserName': u'libing', u'Email': u'libing@35.cn'}
查看聚集的多条记录
>>> for item in db.Account.find():
item
item
>>> for item in db.Account.find({"UserName":"libing"}):
item["UserName"]
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
--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":"libing@126.com","Password":"123"}})
删除记录
>>> db.Account.remove() -- 全部删除
>>> db.Test.remove({"UserName":"keyword"})