Python 连接 Oracle 示例
2012-08-21 10:40
288 查看
二. Python 连Oracle 的基本操作
2.1 DB连接和关闭DB连接
2.1.1 方法一:用户名,密码和监听 分开写
[root@rac1 u01]# cat db.py
import cx_Oracle
db=cx_Oracle.connect('system','oracle','192.168.2.42:1521/dave')
print db.version
db.close()
[root@rac1 u01]# python db.py
10.2.0.1.0
2.1.2 方法二:用户名,密码和监听写在一起
[root@rac1 u01]# cat db.py
import cx_Oracle
db=cx_Oracle.connect('system/oracle@192.168.2.42:1521/dave')
print db.version
db.close()
[root@rac1 u01]# python db.py
10.2.0.1.0
2.1.3 方法三:配置监听并连接
[root@rac1 u01]# cat db.py
import cx_Oracle
tns=cx_Oracle.makedsn('rac1',1521,'dave1')
db=cx_Oracle.connect('system','oracle',tns)
print tns
print db.version
vs=db.version.split('.')
print vs
if vs[0]=='10':
print "This is
Oracle 10g!"
db.close()
[root@rac1 u01]# python db.py
(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=rac1)(PORT=1521)))(CONNECT_DATA=(SID=dave1)))
10.2.0.1.0
['10', '2', '0', '1', '0']
This is
Oracle 10g!
2.2 建立cursor 并执行SQL语句
[root@rac1 u01]# cat db.py
import cx_Oracle
tns=cx_Oracle.makedsn('rac1',1521,'dave1')
db=cx_Oracle.connect('system','oracle',tns) --创建连接
cr=db.cursor() --创建cursor
sql='select * from phone'
cr.execute(sql) --执行sql 语句
print "\nThis is Fetchall!"
rs=cr.fetchall() --一次返回所有结果集
print "print all:(%s)" %rs
print "\n print by row:"
for x in rs:
print x
print "\nThis is Fetone!"
cr.execute(sql)
while(1):
rs=cr.fetchone() --一次返回一行
if rs ==None:break
print rs
--使用参数查询
print "\n select with parameter:"
pr={'id':3,'tel':13888888888}
cr.execute('select * from phone where id=:id or phone=:tel',pr)
--这里我们将参数作为一个字典来处理的
rs=cr.fetchall()
print rs
cr.execute('select * from phone where id=:myid or phone=:myphone',myid=2,myphone=13888888888)
--这里我们直接写参数
rs=cr.fetchall()
print rs
cr.close()
db.close()
[root@rac1 u01]# python db.py
This is Fetchall!
print all:([(1, 13865999999L), (2, 13888888888L)])
print by row:
(1, 13865999999L)
(2, 13888888888L)
This is Fetone!
(1, 13865999999L)
(2, 13888888888L)
select with parameter:
[(2, 13888888888L)]
[(2, 13888888888L)]
Python 类型和Oracle 类型的对应关系:
During the fetch stage, basic
Oracle data types get mapped into their Python equivalents. cx_Oracle maintains a separate set of data types that helps in this transition. The Oracle - cx_Oracle - Python mappings are:
三. 一个完成的示例
在这个例子里,我们将用Python 对DB 进行一些操作,包括,创建一张表,并插入一些数据,在修改其中的部分数据。
[root@rac1 u01]# cat dave.py
#!/usr/bin/python
#coding=utf-8
import cx_Oracle
import sys
import urllib
import os
def connectDB(dbname='dave'):
if dbname=='dave':
connstr='system/Oracle@192.168.2.42:1521/dave'
db=cx_Oracle.connect(connstr)
return db
def sqlSelect(sql,db):
#include:select
cr=db.cursor()
cr.execute(sql)
rs=cr.fetchall()
cr.close()
return rs
def sqlDML(sql,db):
#include: insert,update,delete
cr=db.cursor()
cr.execute(sql)
cr.close()
db.commit()
def sqlDML2(sql,params,db):
# execute dml with parameters
cr=db.cursor()
cr.execute(sql,params)
cr.close()
db.commit()
def sqlDDL(sql,db):
#include: create
cr=db.cursor()
cr.execute(sql)
cr.close()
if __name__=='__main__':
print "This is a test python program,write by tianlesoftware!\n"
os.environ['NLS_LANG']='SIMPLIFIED CHINESE_CHINA.UTF8'
#connect to database:
db=connectDB()
#create a table:
sql='create table dave(id number,name varchar2(20),phone number)'
sqlDDL(sql,db)
#insert data to table dave:
sql='insert into dave values(1,\'tianlesoftware\',13888888888)'
sqlDML(sql,db)
dt=[{'id':2,'name':'dave','phone':138888888888},
{'id':3,'name':'Oracle','phone':13888888888},
{'id':4,'name':'anqing','phone':13888888888}]
sql='insert into dave values(:id,:name,:phone)'
for x in dt:
sqlDML2(sql,x,db)
#select the result:
print "this is the first time select the data from dave"
sql='select * from dave'
rs=sqlSelect(sql,db)
for x in rs:
print x
#update data where id=1,change the name to anhui
sql='update dave set name=\'anhui\' where id=1'
sqlDML(sql,db)
#select again:
print "\n change the nanme to anhui where id equal 1,and select the result"
sql='select * from dave'
rs=sqlSelect(sql,db)
for x in rs:
print x
#delete data where id=3
sql='delete from dave where id=3'
sqlDML(sql,db)
#select again:
print "\n delete the data where id equal 3 and select the result"
sql='select * from dave'
rs=sqlSelect(sql,db)
for x in rs:
print x
db.close()
[root@rac1 u01]# python dave.py
This is a test python program,write by tianlesoftware!
this is the first time select the data from dave
(1, 'tianlesoftware', 13888888888L)
(2, 'dave', 138888888888L)
(3, 'Oracle', 13888888888L)
(4, 'anqing', 13888888888L)
change the nanme to anhui where id equal 1,and select the result
(1, 'anhui', 13888888888L)
(2, 'dave', 138888888888L)
(3, 'Oracle', 13888888888L)
(4, 'anqing', 13888888888L)
delete the data where id equal 3 and select the result
(1, 'anhui', 13888888888L)
(2, 'dave', 138888888888L)
(4, 'anqing', 13888888888L)
关于Python 连接Oracle 数据库,及一些基本操作,就这么多。
2.1 DB连接和关闭DB连接
2.1.1 方法一:用户名,密码和监听 分开写
[root@rac1 u01]# cat db.py
import cx_Oracle
db=cx_Oracle.connect('system','oracle','192.168.2.42:1521/dave')
print db.version
db.close()
[root@rac1 u01]# python db.py
10.2.0.1.0
2.1.2 方法二:用户名,密码和监听写在一起
[root@rac1 u01]# cat db.py
import cx_Oracle
db=cx_Oracle.connect('system/oracle@192.168.2.42:1521/dave')
print db.version
db.close()
[root@rac1 u01]# python db.py
10.2.0.1.0
2.1.3 方法三:配置监听并连接
[root@rac1 u01]# cat db.py
import cx_Oracle
tns=cx_Oracle.makedsn('rac1',1521,'dave1')
db=cx_Oracle.connect('system','oracle',tns)
print tns
print db.version
vs=db.version.split('.')
print vs
if vs[0]=='10':
print "This is
Oracle 10g!"
db.close()
[root@rac1 u01]# python db.py
(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=rac1)(PORT=1521)))(CONNECT_DATA=(SID=dave1)))
10.2.0.1.0
['10', '2', '0', '1', '0']
This is
Oracle 10g!
2.2 建立cursor 并执行SQL语句
[root@rac1 u01]# cat db.py
import cx_Oracle
tns=cx_Oracle.makedsn('rac1',1521,'dave1')
db=cx_Oracle.connect('system','oracle',tns) --创建连接
cr=db.cursor() --创建cursor
sql='select * from phone'
cr.execute(sql) --执行sql 语句
print "\nThis is Fetchall!"
rs=cr.fetchall() --一次返回所有结果集
print "print all:(%s)" %rs
print "\n print by row:"
for x in rs:
print x
print "\nThis is Fetone!"
cr.execute(sql)
while(1):
rs=cr.fetchone() --一次返回一行
if rs ==None:break
print rs
--使用参数查询
print "\n select with parameter:"
pr={'id':3,'tel':13888888888}
cr.execute('select * from phone where id=:id or phone=:tel',pr)
--这里我们将参数作为一个字典来处理的
rs=cr.fetchall()
print rs
cr.execute('select * from phone where id=:myid or phone=:myphone',myid=2,myphone=13888888888)
--这里我们直接写参数
rs=cr.fetchall()
print rs
cr.close()
db.close()
[root@rac1 u01]# python db.py
This is Fetchall!
print all:([(1, 13865999999L), (2, 13888888888L)])
print by row:
(1, 13865999999L)
(2, 13888888888L)
This is Fetone!
(1, 13865999999L)
(2, 13888888888L)
select with parameter:
[(2, 13888888888L)]
[(2, 13888888888L)]
Python 类型和Oracle 类型的对应关系:
During the fetch stage, basic
Oracle data types get mapped into their Python equivalents. cx_Oracle maintains a separate set of data types that helps in this transition. The Oracle - cx_Oracle - Python mappings are:
Oracle | cx_Oracle | Python |
VARCHAR2 NVARCHAR2 LONG | cx_Oracle.STRING | str |
CHAR | cx_Oracle.FIXED_CHAR | |
NUMBER | cx_Oracle.NUMBER | int |
FLOAT | float | |
DATE | cx_Oracle.DATETIME | datetime.datetime |
TIMESTAMP | cx_Oracle.TIMESTAMP | |
CLOB | cx_Oracle.CLOB | cx_Oracle.LOB |
在这个例子里,我们将用Python 对DB 进行一些操作,包括,创建一张表,并插入一些数据,在修改其中的部分数据。
[root@rac1 u01]# cat dave.py
#!/usr/bin/python
#coding=utf-8
import cx_Oracle
import sys
import urllib
import os
def connectDB(dbname='dave'):
if dbname=='dave':
connstr='system/Oracle@192.168.2.42:1521/dave'
db=cx_Oracle.connect(connstr)
return db
def sqlSelect(sql,db):
#include:select
cr=db.cursor()
cr.execute(sql)
rs=cr.fetchall()
cr.close()
return rs
def sqlDML(sql,db):
#include: insert,update,delete
cr=db.cursor()
cr.execute(sql)
cr.close()
db.commit()
def sqlDML2(sql,params,db):
# execute dml with parameters
cr=db.cursor()
cr.execute(sql,params)
cr.close()
db.commit()
def sqlDDL(sql,db):
#include: create
cr=db.cursor()
cr.execute(sql)
cr.close()
if __name__=='__main__':
print "This is a test python program,write by tianlesoftware!\n"
os.environ['NLS_LANG']='SIMPLIFIED CHINESE_CHINA.UTF8'
#connect to database:
db=connectDB()
#create a table:
sql='create table dave(id number,name varchar2(20),phone number)'
sqlDDL(sql,db)
#insert data to table dave:
sql='insert into dave values(1,\'tianlesoftware\',13888888888)'
sqlDML(sql,db)
dt=[{'id':2,'name':'dave','phone':138888888888},
{'id':3,'name':'Oracle','phone':13888888888},
{'id':4,'name':'anqing','phone':13888888888}]
sql='insert into dave values(:id,:name,:phone)'
for x in dt:
sqlDML2(sql,x,db)
#select the result:
print "this is the first time select the data from dave"
sql='select * from dave'
rs=sqlSelect(sql,db)
for x in rs:
print x
#update data where id=1,change the name to anhui
sql='update dave set name=\'anhui\' where id=1'
sqlDML(sql,db)
#select again:
print "\n change the nanme to anhui where id equal 1,and select the result"
sql='select * from dave'
rs=sqlSelect(sql,db)
for x in rs:
print x
#delete data where id=3
sql='delete from dave where id=3'
sqlDML(sql,db)
#select again:
print "\n delete the data where id equal 3 and select the result"
sql='select * from dave'
rs=sqlSelect(sql,db)
for x in rs:
print x
db.close()
[root@rac1 u01]# python dave.py
This is a test python program,write by tianlesoftware!
this is the first time select the data from dave
(1, 'tianlesoftware', 13888888888L)
(2, 'dave', 138888888888L)
(3, 'Oracle', 13888888888L)
(4, 'anqing', 13888888888L)
change the nanme to anhui where id equal 1,and select the result
(1, 'anhui', 13888888888L)
(2, 'dave', 138888888888L)
(3, 'Oracle', 13888888888L)
(4, 'anqing', 13888888888L)
delete the data where id equal 3 and select the result
(1, 'anhui', 13888888888L)
(2, 'dave', 138888888888L)
(4, 'anqing', 13888888888L)
关于Python 连接Oracle 数据库,及一些基本操作,就这么多。
相关文章推荐
- 在PYTHON中,用cx_Oracle连接ORACLE数据库简单示例
- Python 连接 Oracle 示例
- Python 连接 Oracle 示例
- Python 连接 Oracle 示例
- python连接oracle 以及 ubuntu安装rpm
- python3.4连接和读取oracle数据表
- c# 连接oracle简单示例
- python连接oracle
- python连接mysql/Oracle及读取数据库内容
- python 连接oracle
- python使用mysqldb连接数据库操作方法示例详解
- python 连接 Oracle 乱码问题(cx_Oracle)
- python cx_Oracle的基础使用方法(连接和增删改查)
- python连接数据库示例(东西写得很详细,剽过来了)
- python连接mysql数据库示例(做增删改操作)
- Python实现的连接mssql数据库操作示例
- mysql oracle python连接
- python3.4.3 连接Oracle生成报表并发送邮件
- Python连接oracle