用Python如何操作Oracle

import cx_Oracle

#建立和数据库系统的连接
conn = cx_Oracle.connect('emssxjk/emssxjk@orcl')
#获取操作游标
cursor = conn.cursor()
#执行SQL,创建一个表
cursor.execute("""create table tb_user(id number, name varchar2(50),password varchar(50),primary key(id))""")
#关闭连接，释放资源
cursor.close()
#执行完成，打印提示信息
print 'Completed!'

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#在Oracle插入数据

import cx_Oracle

conn = cx_Oracle.connect('emssxjk/emssxjk@orcl')
cursor = conn.cursor()

#插入一条记录
cursor.execute("""insert into tb_user values(1,'admin','password')""");

#再插入一条数据
param={'id':2,'n':'admin','p':'password'}
cursor.execute('insert into tb_user values(:id,:n,:p)',param);

#一次插入多条数据,参数为字典列表形式
param=[{'id':3,'n':'admin','p':'password'},{'id':4,'n':'admin','p':'password'},{'id':5,'n':'admin','p':'password'}];
cursor.executemany('insert into tb_user values(:id,:n,:p)',param);

#再一次插入多条数据
param=[];
#生成5条插入数据，参数为元组列表形式
for i in range(6,11):   # [6,7,8,9,10]
    param.append((i,'user'+str(i),'password'+str(i)))
#插入数据
cursor.executemany('insert into tb_user values(:1,:2,:3)',param);

cursor.close();
#提交更改
conn.commit();
conn.close();

#!/usr/bin/env python
# -*- coding:utf-8 -*-

#在Oracle中查询数据
import cx_Oracle

conn = cx_Oracle.connect('emssxjk/emssxjk@orcl')
cursor = conn.cursor()

#执行查询 语句
cursor.execute("""select * from tb_user""")

#获取一条记录
one = cursor.fetchone()
print '1: id:%s,name:%s,password:%s'%one;

#获取两条记录!!!注意游标已经到了第二条
two = cursor.fetchmany(2)
print '2 and 3:',two[0],two[1]

#获取其余记录!!!注意游标已经到了第四条
three = cursor.fetchall();
for row in three:
    print row   #打印所有结果

print '条件查询'
cursor.prepare("""select * from tb_user where id <= :id""")
cursor.execute(None,{'id':5})
for row in cursor:  #相当于fetchall()
    print row

cursor.close();
conn.close();