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。
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...
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...
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: ...
connection=cx_Oracle.connect(username, userpwd, dsn) cx_Oracle.DatabaseError: ORA-12505: TNS:listener does not currently know of SID given in connect descriptor oracle@rac3:/opt/oracle/11.2.0/alifpre/network/admin>cat tnsnames.ora # tnsnames.ora Network Configuration File: /opt/oracle/11.2....
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 ...
with oracledb.connect(user="uname", password="pwd", dsn="localhost/servicename") as connection: with connection.cursor() as cursor: sql = """select sysdate from dual""" for r in cursor.execute(sql): print(r) OperationalError: DPY-6000: cannot connect to database. Listener refused connec...