python操作oracle数据库

jopen的头像 jopen 1016 2015-01-21 16:52 1

 基本信息

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1、首先要下载安装cx_Oracle

      注意:下载的cx_Oracle版本要与自己的python环境版本一致,否则可能连接数据库时报错。
3、python代码

# -*- mode: python; coding: utf-8 -*-
#
# python operate oracle, contain insert、delete、update、select.
#
# @author liyulin  
# @date 2014-11-07  

import cx_Oracle

class PythonOralceUtil:
    def __enter__(self):
        self.conn = cx_Oracle.connect('testuser/testpwd@localhost/CHROMEBOOK') 
        self.cursor = self.conn.cursor()
        return self 
  
    def __exit__(self, type, value, traceback): 
        self.cursor.close()
        self.conn.close()
        
    ############################################
    # 查询reg_codes中的所有数据
    ############################################
    def queryAll(self):
        self.cursor.execute('select * from reg_codes')
        results = self.cursor.fetchall()
        for result in results:
            print result
    
    ############################################
    # 根据序号查询reg_codes中的一条数据
    ############################################
    def queryBySeq(self, seq):
        self.cursor.execute('select * from reg_codes where seq=:1', seq)
        result = self.cursor.fetchone()
        if (result is not None):         
            for index in range(0,6):
                print result[index],
                    
    ############################################
    # 向reg_codes中插入N条数据
    ############################################
    def insertManay(self, insertValue):
        self.conn.begin()
        try:
            self.cursor.executemany('insert into reg_codes(device,unique_code,group_code,input_file,sn,input_ts) values(:1,:2,:3,:4,:5,sysdate)', insertValue)
        except AssertionError:
            self.conn.rollback()
            raise Warning, "invalid insertValue (%s)" % insertValue
        self.conn.commit()
        
    ############################################
    # 更新reg_codes中一条数据
    ############################################
    def updateOne(self, sqe, input_file):
        updateValue = [input_file, sqe]
        self.cursor.execute('update reg_codes set input_file=:1 where seq=:2', updateValue)
    
    ############################################
    # 更新reg_codes中N条数据
    ############################################
    def updateManay(self, updateValues):
        self.conn.begin()
        try:
            self.cursor.executemany('update reg_codes set input_file=:1 where seq=:2', updateValues)
        except AssertionError:
            self.conn.rollback()
            raise Warning, "invalid insertValue (%s)" % updateValues
        self.conn.commit()
    
    ############################################
    # 删除reg_codes中一条数据
    ############################################
    def delete(self, sqe):
        self.cursor.execute('delete from reg_codes where seq=:1', sqe)
    
    ############################################
    # 删除reg_codes中N条数据
    ############################################
    def deleteManay(self, seqs):
        self.conn.begin()
        try:
            self.cursor.executemany('delete from reg_codes where seq=:1', seqs)
        except AssertionError:
            self.conn.rollback()
            raise Warning, "invalid seqs (%s)" % seqs
        self.conn.commit()
            
############################################
# 执行代码
############################################        
with PythonOralceUtil() as pythonOralceUtil:
#     insertValue = [['jerry', 'unique_code2333', 'group_code2333', 'debug233', '1111111111122'],
#                ['jerry', 'unique_code244', 'group_code244', 'debug244', '22222222233'],
#                ['jerry', 'unique_code255', 'group_code255', 'debug255', '33333333344'],
#                ['jerry', 'unique_code266', 'group_code266', 'debug266', '44444444455'],
#                ['jerry', 'unique_code277', 'group_code277', 'debug277', '55555555566']]
#     pythonOralceUtil.insertManay(insertValue)
#     pythonOralceUtil.updateOne('27', 'debug_updated')
#     pythonOralceUtil.delete([27])
#     pythonOralceUtil.deleteManay([[31],[44],[45]])
    updateValues = [['debug_updated', '46'],
                    ['debug_updated', '47'],
                    ['debug_updated', '48'],
                    ['debug_updated', '34']]
    pythonOralceUtil.updateManay(updateValues)
    pythonOralceUtil.queryAll()
    pythonOralceUtil.queryBySeq([27])

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