database:数据库 SQLAlchemy 通过 Engine 管理与数据库的连接信息。 fromsqlalchemyimportcreate_engine,text,Table,MetaData# 1. 创建引擎(mysql数据库引擎)engine = create_engine('mysql+mysqlconnector://root:123456@localhost:3306/my_db', echo=True)# 2. 连接数据库withengine.connect()asconn: result = ...
fromsqlalchemyimportcreate_engine# 替换下设定参数username='your_username'password='your_password'host='your_host'port='your_port'database='your_database'# 建立数据库引擎engine=create_engine(f'dm://{username}:{password}@{host}:{port}/{database}')# 测试连接try:withengine.connect()asconnection...
conn= pymssql.connect(database='commen-db', host='10.0.0.10', user='wei', password='123456', port=1433)ifconn:print('sqlserver connect success') 7 sqlalchemy连接数据库 fromsqlalchemyimportcreate_engine conn_str='oracle://wei:123456@10.0.0.10:1521/commen-db'engine=create_engine(conn_str)...
RESTORE ARCHIVE LOG FROM BACKUPSET ‘/home/dm_bak/arch_all_for_restore’ TO DATABASE ‘/opt/dmdbms/data/DAMENG_FOR_RESTORE/dm.ini’ OVERWRITE 2; (3)恢复数据库 RECOVER DATABASE ‘/opt/dmdbms/data/DAMENG_FOR_RESTORE/dm.ini’ FROM BACKUPSET ‘/home/dm_bak/db_full_bak_for_recover_backups...
# 读取数据库里的数据 import pandas as pd from sqlalchemy import create_engine def database2df(db_info,querysql): '''将数据库的数据读取到dataframe(sql server) 参数: db_info: dic 数据库信息,包含用户名称,密码,服务器ip地址,端口,需要将资料上传到的数据库名称 示例: db_info = { 'username':...
fromsqlalchemy.ext.declarativeimportdeclarative_basefromsqlalchemyimportColumn,Integer,String# 创建基类...
示例程序examples/example_2/main.py具有相同的功能,examples/example_1/main.py但仅使用 SQLAlchemy 与author_book_publisher.dbSQLite 数据库进行交互。程序被分解为main()函数和它调用的函数: def main(): """Main entry point of program""" # Connect to the database using SQLAlchemy with resources.path...
Then they create the engine variable to communicate with SQLite and the author_book_publisher.db database file, which is SQLAlchemy’s access point to the database. Line 8 creates the Session class from the SQLAlchemy’s sessionmaker(). Line 9 binds the Session to the engine created in ...
An ORM doesn't need to hide the "R". A relational database provides rich, set-based functionality that should be fully exposed. SQLAlchemy's ORM provides an open-ended set of patterns that allow a developer to construct a custom mediation layer between a domain model and a relational schem...