Python 2.7 MySQLdb将从数据库读取的最后一行保存到文本文件中

Posted 2021-03-27

我的任务是获取MySQL数据库以将数据发送到Salesforce并创建票证。我目前有python从数据库下载所需的表并将该信息保存到.xlsx表。然后我有另一个python脚本将数据上传到Google Doc表，然后是一个Javascript触发器，它将数据提交到salesforce，并且所有工作都按照我的预期运行。

我遇到的问题是，当它从MySQL中提取数据时，它会一次又一次地提取相同的信息，我需要它记住它最后一次抓取的最后一行或客户ID，将该ID或行保存到一个。 txt文件然后在下次脚本运行时拉出相同的数据，因此它从该行或ID开始，而不是从顶部再次开始。

任何帮助将不胜感激。

#!/usr/bin/python
import smtplib
import base64
import os
import sys
import csv
from xlsxwriter.workbook import Workbook
import xlwt
import MySQLdb
def sql_run():
ur = 'user' # your username
pd = 'password' # your password
ht = '192.168.1.10' # your host
pt = 3306
db = 'database' # database where your table is stored
#table = 'rma_customer' # table you want to save

con = MySQLdb.connect(user=ur, passwd=pd, host=ht, port=pt, db=db)
cursor = con.cursor()

query = "SELECT cus_id, cus_username FROM database.rma_customer"
query0 = "SELECT cus_firstname, cus_lastname, cus_cell_phone FROM database.rma_customer_details"
query1 = "SELECT cus_address_1 FROM database.rma_customer_address"
query2 = "SELECT cus_city, cus_postcode FROM database.rma_customer_address"
query3 = "SELECT regpro_model_type, regpro_buy_location, regpro_sn FROM database.rma_reg_product"
cursor.execute(query)
workbook = Workbook('outfile.xlsx')
sheet = workbook.add_worksheet("Warranty Info")
headers = ['ID', 'Email', 'FirstName', 'LastName', 'Phone', 'Street', 'City', 'Postal', 'Product', 'Store', 'SN']
for i, header in enumerate(headers):
    sheet.write(0, i, header)
for r, row in enumerate(cursor.fetchall()):
    r = r + 1
    for c, col in enumerate(row):

        sheet.write(r, c, col)

cursor.execute(query0)  
for r, row in enumerate(cursor.fetchall()):
    r = r + 1
    for c, col in enumerate(row):

        sheet.write(r, c+2, col)        

cursor.execute(query1)  
for r, row in enumerate(cursor.fetchall()):
    r = r + 1
    for c, col in enumerate(row):

        sheet.write(r, c+5, col)

cursor.execute(query2)  
for r, row in enumerate(cursor.fetchall()):
    r = r + 1
    for c, col in enumerate(row):

        sheet.write(r, c+6, col)

cursor.execute(query3)  
for r, row in enumerate(cursor.fetchall()):
    r = r + 1
    for c, col in enumerate(row):

        sheet.write(r, c+8, col)

cursor.close ()
workbook.close()
con.close ()
sys.exit()
# exit the program



sql_run()

答案

1. 在rowyou中添加table从中提取信息。
2. 拉id（第0行）作为唯一标识符
3. 更新row，id有True或False。
4. 给你的查询一个condition，说行必须是True / False

这样您就可以确保它停止迭代相同的信息。

编程方式：

query = "SELECT cus_id, cus_username FROM database.rma_customer WHERE row = 'True'"
...

data = cursor.execute(query)
for col in data:
    id = col[0]
...
cursor.execute("""
    UPDATE table
    SET row= %s
    WHERE id= %s
""", (row, id))

...代表你的代码。我想不出你想放置代码片段的位置。