数据库驻留连接池是 Oracle Database 11g 的一个新特性。它对 Web 应用程序常用的短期脚本非常有用。它允许随着 Web 站点吞吐量的增长对连接数量进行扩充。它还支持多台计算机上的多个 Apache 进程共享一个小规模的数据库服务器进程池。没有 DRCP,Python 连接必须启动和终止一个服务器进程。
config.get("oracle","password"), config.get("oracle","host/port/database") )# 创建游标,生成游标对象self.oracle_cursor = self.oracle_connection.cursor()defselect_one_data(self, sql):""" 获取一条数据 :param sql: :return: """self.oracle_connection.commit() self.oracle_cursor.execute(sql...
connection = cx_Oracle.connect("oracle用户名","oracle密码", dsn) cursor = cx_Oracle.Cursor(connection)# 返回连接的游标对象cursor.execute("select * from ac01 where aac003='whosyourdaddy") result = cursor.fetchall()print(result) 找不到64位client cx_Oracle.DatabaseError: DPI-1047: Cannot loc...
To create a connection to Oracle, perform the following steps. . Open a terminal window and review the code contained in$HOME/connect.py Thecx_Oraclemodule is imported to provide the API for accessing the Oracle database. Many inbuilt and third party modules can be included in this way in...
connection=cx_Oracle.connect(username, userpwd, dsn) sql="select * from *** where rownum<5" data = pd.read_sql(sql,connection) ##直接将读取的sql数据转换成数据框,有助于下一步的可视化和统计建模 data.head(n=2) 1. 2. 3. 4. 5...
conn=pymysql.connect(host='localhost',user='root',password='password',database='test')# 创建游标对象 cursor=conn.cursor()# 执行SQL语句 cursor.execute("SELECT * FROM users")# 查询数据 rows=cursor.fetchall()forrowinrows:print(row)# 关闭游标和连接 ...
importcx_Oracle# 建立数据库连接 connection=cx_Oracle.connect("username","password","localhost:1521/orcl")# 创建游标对象 cursor=connection.cursor()try:# 执行查询 query="SELECT * FROM employees"cursor.execute(query)# 处理查询结果forrow in cursor:id=row[0]name=row[1]print("ID: {}, Name: ...
使用cx_oracle是需要客户端的机器环境(本地环境)缺少client而导致报错的产生(cx_Oracle requires Oracle Client libraries. The libraries provide the necessary network connectivity to access an Oracle Database instance. They also provide basic and advanced connection management and data features to cx_Oracle....
Improved dead connection detection handling. As well as tweaking cx_Oracle to improve where and when dead connections are checked for, now if an Oracle Database error indicates that a connection is no longer usable, the errorDPI-1080: connection was closed by ORA-%dis returned to the app. ...
Do you have a small, single Python script that immediately runs to show us the problem? import cx_Oracle dsn_tns = cx_Oracle.makedsn("localhost", PORT, sid="SID") conn = cx_Oracle.connect(user=r'username', password='pass', dsn=dsn_tns) I am trying to connect to database that is...