Python调用mysql更新数据的方法

本文实例讲述了Python通过调用mysql存储过程实现更新数据功能。分享给大家供大家参考，具体如下：

一、需求分析

由于管理费率配置错误，生成订单的还本付息表和订单表的各种金额，管理费之间的计算都有错误，需要进行数据订正。为此，为了造个轮子，以后省很多功夫，全部用程序去修正，不接入人工。

二、带参数mysql 存储过程创建

1、更新订单付息表（t_order_rapay）

drop procedure if exists update_t_order_rapay;
delimiter $$
create procedure update_t_order_rapay(IN orderNo varchar(64))
begin
  declare t_order_no varchar(64);
  set t_order_no=orderNo;
  UPDATE t_order_repay
  SET total_amount=principal+interest+round(manage_amount*0.0808/0.052,3)+breach_amount,
    left_amount=principal+interest+round(manage_amount*0.0808/0.052,3)+breach_amount,
  left_repay_manager=round(manage_amount*0.0808/0.052,3),
  manage_amount=round(manage_amount*0.0808/0.052,3)
  WHERE order_no=t_order_no;
end $$
delimiter;

2、更新订单表（t_order_info）

drop procedure if exists update_t_order_info;
delimiter $$
create procedure update_t_order_info(IN orderNo varchar(64))
begin
  declare t_order_no varchar(64);
  set t_order_no=orderNo;
  SELECT left_amount into @m1 from t_order_repay WHERE order_no=t_order_no ORDER BY plan_time LIMIT 1;
  UPDATE t_order_info
  set manage_cost_rate=0.0808,
  manage_cost=round(manage_cost*0.0808/0.052,3),
  left_amount=borrow_amount+interest_amount+manage_cost,
  next_amount_need=@m1
  WHERE order_no=t_order_no;
end $$
delimiter;

3、python 调用mysql 中的存储过程

# encoding: utf-8
import time
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
time1 = time.time()
import pandas as pd
import pymysql
############################################从数据库读数据###########################################
###########线上######################
# 加上字符集参数，防止中文乱码
# conn=pymysql.connect(
#  host="##########",
#  database="######",
#  user="####",
#  password="##########",
#  port=#######,
#  charset='utf8'
# )
# #############测试库######################
# ## 加上字符集参数，防止中文乱码
# conn=pymysql.connect(
#  host="172.16.34.32",
#  database="#########",
#  user="admin",
#  password="##############",
#  port=#########,
#  charset='utf8'
# )
#sql语句(安徽）
# sqlcmd="""
# SELECT order_no from t_order_info WHERE offline_org_no in(
# 0032,0035,0036
#
#
# ) and substr(create_time,1,10)>="2017-10-31"
#
# and `status` in(105,106,107,108)
#
# and manage_cost_rate=0.052
#
#
# """
#################sql语句（江苏）
# sqlcmd2="""
# SELECT order_no from t_order_info WHERE offline_org_no in(
# 0002,0005,0006,0007,0008,0009,0010,0011,0012,0013,0014,0017,0018,0019,0025,0026,0027,0028,0030,0031,0033,0034
# ) and substr(create_time,1,10)>="2017-10-31"
# and `status` in(105,106,107,108)
# and manage_cost_rate=0.052
#
# """
#利用pandas 模块导入mysql数据
# data=pd.read_sql(sqlcmd2,conn)
# print data
#
#
# ###################更新order_rapay表
# for each in data["order_no"]:
#   print each
#   # 创建游标
#   cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
#   #有参数存储过程
#   cursor.execute('call update_t_order_rapay(%s)',(each))
#   conn.commit()
#
# print "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"
# #####################更新order_info表###################
# for each in data["order_no"]:
#   print each
#
#   # 创建游标
#   cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
#   #有参数存储过程
#   cursor.execute('call update_t_order_info(%s)', (each))
#   conn.commit()
#
#
# cursor.close()
# print '调用存储过程完毕................'
# conn.close()
# time2=time.time()
# print u'总共耗时：' + str(time2 - time1) + 's'

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