""" dsn_str=cx_Oracle.makedsn(ip, port, instance) con=cx_Oracle.connect(user=username, password=password, dsn=dsn_str) cursor=con.cursor() cursor.execute(drop_table) cursor.execute(create_table) query_string="INSERT INTO dbaastable(test_value) VALUES ('"+insert_value+"')" # print quer...
# 创建数据库引擎 engine=create_engine('sqlite:///example.db')# 创建基类 Base=declarative_base()# 定义模型类classUser(Base):__tablename__='users'id=Column(Integer,primary_key=True)name=Column(String)age=Column(Integer)# 创建表 Base.metadata.create_all(engine)# 创建会话 Session=sessionmaker(...
connect('example.db') # 创建游标对象 cursor = conn.cursor() # 执行SQL查询 cursor.execute('SELECT * FROM table_name') # 获取查询结果 results = cursor.fetchall() # 关闭连接 conn.close() MySQL Connector和PyMySQL:连接MySQL数据库。 MySQL Connector和PyMySQL是两个常用于连接MySQL数据库的Python...
独立连接由cx_Oracle.connect()或其别名创建cx_Oracle.Connection(),其参数如下所示 cx_Oracle.connect(user=None, password=None, dsn=None, mode=cx_Oracle.DEFAULT_AUTH, handle=0, pool=None, threaded=False, events=False, cclass=None, purity=cx_Oracle.ATTR_PURITY_DEFAULT, newpassword=None, encoding...
#obtaining a connection and predefining a memory area for a BLOB dbconn = cx_Oracle.connect('usr', 'pswd', '127.0.0.1/XE') dbconn.autocommit = True cur = dbconn.cursor() cur.setinputsizes(blobdoc=cx_Oracle.BLOB) #executing INSERT statements saving BLOBs to the database ...
当第一条 SQL 语句通过 cursor.execute() 方法传给数据库时,一个事务就启动了。当没有其他事务已从该会话启动时,可以使用 db.begin() 方法显式启动一个新事务。为了获得最高一致性,当连接对象被关闭或删除时,cx_Oracle 会默认回滚所有事务。 cx_Oracle.Connection.autocommit 属性仍可设置为 1,从而使 Oracle ...
connection=oracledb.connect( config_dir=r"C:\opt\OracleCloud\MYDB", user="admin", password=password, dsn="db2024_low", wallet_location=r"C:\opt\OracleCloud\MYDB", wallet_password=wallet_pw, https_proxy='myproxy.example.com', https_proxy_port=80) ...
(ods_ab) File "/xxx/oracle_util.py". line 11, in get_oracle_conn return oracledb.connect(user=db infol'user'], password=db_infol'password'], File "/home/xxx/local/lib/python3.8/site-packages/oracledb/connection.py", line 1020, in connect return conn_class(dsn=dsn, pool=pool, ...
databaseName() 'contacts.sqlite' >>> db.connectionName() 'con1' In this example, you see that .database() takes two arguments:connectionName holds the connection name that you need to use. If you don’t pass a connection name, then the default connection will be used. open holds a ...
(or later) is required, depending on the Oracle Client library version. Oracle Database's standard client-server version interoperability allows connection to both older and newer databases. For example when python-oracledb uses Oracle Client 19c libraries, then it can connect to Oracle Database ...