search
HomeDatabaseMysql TutorialPython+cx_Oracle安装及一个简单示例(归档下热备数据文件)

系统环境:[root@nich4 cx_Oracle-py]# uname -aLinux nich4 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:54 EDT 2009 i686 i686 i38

系统环境:
[root@nich4 cx_Oracle-py]# uname -a
Linux nich4 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:54 EDT 2009 i686 i686 i386 GNU/Linux

python版本:
[root@nich4 cx_Oracle-py]# python -V
Python 2.4.3

oracle版本:
oracle database 10.2.0.5 x86

cx_Oracle简介:
cx_Oracle 是一个 Python 扩展模块,通过使用所有数据库访问模块通用的数据库 API 来实现 Oracle 数据库的查询和更新。为使用一些专为 Oracle 设计的特性,还加入了多个通用数据库 API 的扩展。

cx_Oracle 的开发历时十多年,涵盖了大多数需要在 Python 中访问 Oracle 的客户的需求。2008 年 12 月,,一个新的主要版本解决了早期版本的众多限制,并增添了对 Python 3.0 和 Oracle 新推出的一些特性的支持。

cx_Oracle官方及下载:

下载与python版本对应的cx_Oracle版本,一般选择非UNICODE版本就行了.
我选择的是CentOS 5 i386 RPM (Oracle 10g, Python 2.4)

下载之后rpm -ivh 安装.
修改oracle环境变量,加入:
export LD_LIBRARY_PATH=/opt/oracle/10g\:/opt/oracle/10g/network/lib

连接数据库示例:
以下是一个在归档数据库下热备份数据文件的脚本.
#!/bin/env python
# -*- coding: UTF-8 -*-
# Modified: 20101012-23:25:43 by nich4@msn.com
# Filename: hotbak.py
#
import subprocess
import cx_Oracle
import os

db_username = 'sys'
db_passwd = 'oracle123'
db_sid = 'sol10g'
bak_dir = '/u01/app/oracle/oradata/bak/sol10g/'

db = cx_Oracle.connect(db_username,db_passwd,db_sid,cx_Oracle.SYSDBA)
print "连接数据库成功!"
curs = db.cursor()

sql = r'''select 'cp '||name||' %s' from v$datafile''' % bak_dir
res = []
for rs in curs.execute(sql):
res.append(rs[0])

curs.execute('alter database begin backup')
print "开始备份数据文件..."
for i in res:
fname = i.split()[1].split('/')[-1].strip()
print "正在备份%s 到 %s ..." % (fname,bak_dir)
subprocess.call(i,shell=True)
print "数据文件%s 备份完成!" % fname

curs.execute('alter database end backup')
db.close()
print "备份完成!"

注: 该脚本在solaris-10+oracle-10gR2下测试. 这个脚本没有使用python的shutil模块来执行文件的拷贝.仅为演示用.

linux

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
什么是oracle asm什么是oracle asmApr 18, 2022 pm 04:16 PM

oracle asm指的是“自动存储管理”,是一种卷管理器,可自动管理磁盘组并提供有效的数据冗余功能;它是做为单独的Oracle实例实施和部署。asm的优势:1、配置简单、可最大化推动数据库合并的存储资源利用;2、支持BIGFILE文件等。

oracle怎么查询所有索引oracle怎么查询所有索引May 13, 2022 pm 05:23 PM

方法:1、利用“select*from user_indexes where table_name=表名”语句查询表中索引;2、利用“select*from all_indexes where table_name=表名”语句查询所有索引。

Oracle怎么查询端口号Oracle怎么查询端口号May 13, 2022 am 10:10 AM

在Oracle中,可利用lsnrctl命令查询端口号,该命令是Oracle的监听命令;在启动、关闭或重启oracle监听器之前可使用该命令检查oracle监听器的状态,语法为“lsnrctl status”,结果PORT后的内容就是端口号。

oracle全角怎么转半角oracle全角怎么转半角May 13, 2022 pm 03:21 PM

在oracle中,可以利用“TO_SINGLE_BYTE(String)”将全角转换为半角;“TO_SINGLE_BYTE”函数可以将参数中所有多字节字符都替换为等价的单字节字符,只有当数据库字符集同时包含多字节和单字节字符的时候有效。

oracle怎么删除sequenceoracle怎么删除sequenceMay 13, 2022 pm 03:35 PM

在oracle中,可以利用“drop sequence sequence名”来删除sequence;sequence是自动增加数字序列的意思,也就是序列号,序列号自动增加不能重置,因此需要利用drop sequence语句来删除序列。

oracle怎么查询数据类型oracle怎么查询数据类型May 13, 2022 pm 04:19 PM

在oracle中,可以利用“select ... From all_tab_columns where table_name=upper('表名') AND owner=upper('数据库登录用户名');”语句查询数据库表的数据类型。

oracle查询怎么不区分大小写oracle查询怎么不区分大小写May 10, 2022 pm 05:45 PM

方法:1、利用“LOWER(字段值)”将字段转为小写,或者利用“UPPER(字段值)”将字段转为大写;2、利用“REGEXP_LIKE(字符串,正则表达式,'i')”,当参数设置为“i”时,说明进行匹配不区分大小写。

Oracle怎么修改sessionOracle怎么修改sessionMay 13, 2022 pm 05:06 PM

方法:1、利用“alter system set sessions=修改后的数值 scope=spfile”语句修改session参数;2、修改参数之后利用“shutdown immediate – startup”语句重启服务器即可生效。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment