Python 连接 Oracle数据库

1.环境设置

[root@oracle ~]# cat /etc/redhat-release

CentOS release 6.9 (Final)

[root@oracle ~]# python -V

Python 2.6.6

版本：Oracle 12c

2.前提：安装cx_Oracle模块依赖包

由于使用Python连接Oracle，所以需要下载oracle客户端包

官网：http://www.oracle.com/technetwork/topics/linuxx86-64soft-092277.html?ssSourceSiteId=otncn

oracle-instantclient12.1-basic-12.1.0.2.0-1.x86_64.rpm

oracle-instantclient12.1-devel-12.1.0.2.0-1.x86_64.rpm

oracle-instantclient12.1-sqlplus-12.1.0.2.0-1.x86_64.rpm

1	`[root@oracle ~]# rpm - ivh oracle-instantclient12.1-*`

3.设置环境变量

[root@oracle ~]# cat ~/.bash_profile

12	`export /usr/lib/oracle/12.1/client64/export LD_LIBRARY_PATH=/usr/lib/oracle/12.1/client64/lib`

4.安装cx_Oracle模块

官网：https://pypi.python.org/pypi/cx_Oracle

cx_Oracle-6.2.1.tar.gz

12	`[root@oracle ~]# tar -zxvf cx_Oracle-6.2.1.tar.gz [root@oracle cx_Oracle-6.2.1]# python setup.py install`

可能会遇到报错

error: command 'gcc' failed with exit status 1

解决方法：

yum install python-devel

yum install libevent-devel

5.查看是否可以导入cx_Oracle模块

[root@oracle ~]# python

Python 2.6.6 (r266:84292, Aug 18 2016, 15:13:37)

[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import cx_Oracle

>>> #无报错说明成功

6.编写Python连接oracle数据库脚本(oracle用户，因为我这里都是用oracle用户权限安装的）

[oracle@oracle ~]$ cat py_oracle.py

#!/usr/bin/env python#-*- coding: UTF-8 -*-import cx_Oracle #导入模块db=cx_Oracle.connect('system/oracle@localhost:1521/ORCL') #连接user/passwd@host:端口/instancecursor = db.cursor() #创建游标对象cursor.execute('select sysdate from dual') #执行命令data = cursor.fetchone() #返回值print('Database time:%s' % data) 打印输出cursor.close() #关闭游标对象db.close() #关闭数据库

7.执行脚本

[oracle@oracle ~]$ python py_oracle.py

1	`Database time:2018-03-20 20:47:59`

Python 连接 Oracle数据库

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