Python/Oracle - 连接Oracle并执行增加、查询语句

cx_Oracle模块的使用（2019.06.22更新）

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【2019.03.10更新版（增加与查询）】

# -*- coding: utf-8 -*-
"""
Created on Sun Mar 10 00:08:05 2019

@author: dell
"""

import cx_Oracle as db

def connectOracle():
    ORACLE_HOST = 'localhost'
    ORACLE_PORT = 1521
    ORACLE_SID = 'xe'
    ORACLE_USER = 'proxypool'
    ORACLE_PASSWORD = '123456'
    #dsn:data source name
    dsn = db.makedsn(ORACLE_HOST,ORACLE_PORT,ORACLE_SID)
    con = db.connect(ORACLE_USER,ORACLE_PASSWORD,dsn)
    #oracleDB = cx_Oracle.connect('ProxyPool/123456@localhost:1521/xe')    #用户密码主机端口SID
    return con

def query(con):
    cur = con.cursor()
    sql = "select table_name from all_tables where owner='PROXYPOOL'"
    cur.execute(sql)
    print("\n>>> "+sql)
    rs = cur.fetchall()
    for list in rs:
        print(list)    #输出指定用户下的所有表名
        
    sql = "select * from proxylist"
    cur.execute(sql)
    rs = cur.fetchall()
    print("\n>>> "+sql)
    for list in rs:
        print(list)     #输出该表中的信息   
    cur.close()


def insert(con):
    sql = "INSERT INTO PROXYLIST(TYPE,DATA) VALUES(:TYPELIST,:DATALIST)"
    recodeList = [{"TYPELIST":'http',"DATALIST":'112.87.71.44:9999'},{"TYPELIST":'http',"DATALIST":'61.178.149.237:59042'}]
    cur = con.cursor()
    cur.executemany(sql,recodeList)
    con.commit()    #将事务交付给数据库进行处理，使用cursor对数据库进行操作后必须进行该操作
    cur.close()

    
if __name__=='__main__':
    con = connectOracle()
    insert(con)
    query(con)
    
    con.close()
    

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【增加块】

注意事项：con.commit()

con = co.connectOracle()
cur = con.cursor()
sql = "UPDATE READER SET BALANCE=BALANCE+5 WHERE ID="+str(reader_id)
cur.execute(sql)
con.commit()
cur.close()