python 操作 mongodb 数据库详情

pip install pymongo

import pymongo

# 方式一
client = pymongo.MongoClient('mongodb://localhost:27017')
# 方式二
client = pymongo.MongoClient('localhost'，27017)
# 方式三,有密码认证
client = pymongo.MongoClient('localhost', 27017, username='xxx', password='xxx')

import pymongo

# 连接
client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test # 或者 db = client['test']
print(db)

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
dbs = client.list_database_names()

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test
# 创建表
collections = db.user # 或者 collections = db['user']
# 删除表
collections.drop()

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test
# 创建表
collections = db.user

# 创建文档数据
user1 = {
'name': 'autofelix',
'age': '25',
'height': '172',
'weight': '60'
}

user2 = {
'name': '飞兔小哥',
'age': '28',
'height': '182',
'weight': '70'
}

# 插入一条文档集合
result = collections.insert_one(user1)
print(result)
print(result.inserted_id)

# 插入多条文档集合
result = collections.insert_many([user1, user2])
print(result)
print(result.inserted_ids)

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test
# 创建表
collections = db.user

# 查询所有
collections.find()
# 查询最近一条
collections.find_one()
# 根据条件查询
collections.find_one({'age':25})

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test
# 创建表
collections = db.user

# 跳过第一条查到的数据
collections.find({'age':{'$gt':10}},['height','age']).skip(1)
# limit限制查询条数
collections.find({'age':{'$gt':10}},['height','age']).limit(1)
# 多条件查询
collections.find_one({'height':{'$gt':150},'age':{'$lt':26,'$gt':10}})
# in查询,查询年龄在25,26,32的数据
collections.find({'age':{'$in':[25, 26, 32]}})
# or查询,查询年龄小于等于23或者大于等于29的数据
collections.find({'$or':[{'age':{'$lte':23}}, {'age':{'$gte':29}}]})
# exists查询
collections.find({'age':{'$exists':True}})
# 正则查询
collections.find({'name':{'$regex':r'.*auto.*'}})

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test
# 创建表
collections = db.user

# 统计集合中总共有多少条数据
collections.find().count()
# 统计集合中年龄大于10岁的共有多少条数据
collections.find({'age':{'$gt':10}}).count()

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test
# 创建表
collections = db.user

# 修改一条数据
collections.update_one({'name': 'autofelix'}, {'$set': {'name': '大神'}})
# 修改多条数据
collections.update_many({'name': 'autofelix'}, {'$set': {'name': '大神'}})

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test
# 创建表
collections = db.user

# 删除一条数据
collections.delete_one({'name': 'autofelix'})
# 删除多条数据
collections.delete_many({'name': 'autofelix'})
# 删除所有数据
collections.delete_many({})

import pymongo

client = pymongo.MongoClient('mongodb://localhost:27017')
# 创建test数据库
db = client.test
# 创建表
collections = db.user

# 对字段 age 按升序排序
collections.find().sort('age')
# 对字段 age 按降序排序
collections.find().sort('age', -1)
# 多字段排序
collections.find().sort((('age',pymongo.ASCENDING),('height',pymongo.ASCENDING)))