MongoDB
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import pymongo # 1、连接MongoDB服务 mongo_py = pymongo.MongoClient() print(mongo_py) # 2、库和表的名字;有时间会自动建库建表 # 数据库 db = mongo_py['test2'] # 表、集合 collection = db['stu'] # 或 # collection = mongo_py.test2.stu one = {'name': '张三', 'age': 15} two_many = [{'name': '张四', 'age': 25}, {'name': '张五', 'age': 12}, {'name': '张六', 'age': 17}] # 3、插入数据 collection.insert(one) collection.insert_many(two_many) # 4、删除数据 collection.delete_many({'name': "张四"}) # 5、更改数据 collection.update({'name': '张三'}, {"name": '小张'}) # 6、查询数据 result = collection.find({'age': 17}) print(result) # 关闭数据库 mongo_py.close()
redis
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import redis client = redis.Redis() # print(client) # 2、设置key key = 'pyone' key2 = 'py4' # 3、string增加 result = client.set(key, '1') result = client.set(key2, '4') print(result) # 删除 result = client.delete(key) # 修改 result = client.set(key2, '3') # 查看 result = client.get(key2) print(str(result))
MySQL
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import pymysql # 1、 连接数据库 conn = pymysql.Connect( host='127.0.0.1', db='grade', user='root', password='1111' ) print(conn) # 打开游标对象 cur = conn.cursor() # 2、增加数据 insert_sub = 'insert into student values("2000000", "新增", 1, "理学院", " ")' cur.execute(insert_sub) # 提交事务 conn.commit() # 3、删除数据 delete_sub = 'delete from student where sid="2000000"' cur.execute(delete_sub) conn.commit() # 需要提交 # 4、修改数据库 update_sub = 'update student set name="新增1" where sid="2000000"' cur.execute(update_sub) conn.commit() # 5、查看数据 show_data = 'select * from student where name="新增1"' cur.execute(show_data) data = cur.fetchall() print(data) # 关闭数据 cur.close() conn.close()