Python implements the method of exporting data from MySQL database tables to generate csv format files

This article illustrates an Python implementation that exports data from MySQL database tables to generate csv format files. To share for your reference, specific as follows:

#!/usr/bin/env python
# -*- coding:utf-8 -*-
"""
 Purpose:  Generate daily summary reconciliation documents 
 Created: 2015/4/27
 Modified:2015/5/1
 @author: guoyJoe
"""
# The import module 
import MySQLdb
import time
import datetime
import os
# The date of 
today = datetime.date.today()
yestoday = today - datetime.timedelta(days=1)
# Check the date 
checkAcc_date = yestoday.strftime('%Y%m%d')
# List of reconciliation documents 
fileDir = "/u02/filesvrd/report"
#SQL statements 
sqlStr1 = 'SELECT distinct pay_custid FROM dbpay.tb_pay_bill WHERE date_acct = %s'
# The total number of pen | Number of successful transactions | Successful transaction amount | Return of the number | Returns the amount of | Cancellation number | Cancellation amount 
sqlStr2="""SELECT totalNum,succeedNum,succeedAmt,returnNum,returnAmt,revokeNum,revokeAmt
  FROM
    (SELECT count(order_id) AS totalNum
      FROM (SELECT p.order_id as order_id
        FROM dbpay.tb_pay_bill p, dbpay.tb_paybillserial q
        WHERE p.oid_billno = q.oid_billno
        AND p.paycust_accttype = 2
        AND p.Paycust_Type = 1
        AND p.stat_bill in (0, 4)
        AND q.pay_stat = 1
        AND q.col_stat = 1
        AND p.pay_custid = %s
        AND q.date_acct = %s
        UNION ALL
        SELECT p.order_id as order_id
        FROM dbpay.tb_pay_bill p, dbpay.tb_paybillserial q
        WHERE p.oid_billno = q.oid_billno
        AND p.col_accttype = 2
        AND p.col_type = 1
        AND p.stat_bill in (0, 4)
        AND q.pay_stat = 1
        AND q.col_stat = 1
        AND p.col_custid = %s
        AND q.date_acct = %s
        UNION ALL
        SELECT R.ORDER_ID AS ORDER_ID
        FROM DBPAY.TB_REFUND_BILL R, DBPAY.TB_PAYBILLSERIAL Q
        WHERE R.oid_refundno = Q.OID_BILLNO
         AND R.ORI_COL_ACCTTYPE = 2
         AND R.ORI_COL_TYPE = 1
         AND R.STAT_BILL = 2
         AND Q.PAY_STAT = 1
         AND Q.COL_STAT = 1
         AND R.ORI_COL_CUSTID = %s
         AND Q.DATE_ACCT = %s ) as total) A,
        (SELECT count(order_id) succeedNum ,sum(amt_paybill) succeedAmt
         FROM (SELECT p.order_id as order_id,
        q.amt_payserial/1000 as amt_paybill
        FROM dbpay.tb_pay_bill p, dbpay.tb_paybillserial q
        WHERE p.oid_billno = q.oid_billno
        AND p.paycust_accttype = 2
        AND p.Paycust_Type = 1
        AND p.stat_bill = '0'
        AND q.pay_stat = 1
        AND q.col_stat = 1
        AND p.pay_custid = %s
        AND q.date_acct = %s
        UNION ALL
        SELECT p.order_id as order_id,
        q.amt_payserial/1000 as amt_paybill
        FROM dbpay.tb_pay_bill p, dbpay.tb_paybillserial q
        WHERE p.oid_billno = q.oid_billno
        AND p.col_accttype = 2
        AND p.col_type = 1
        AND p.stat_bill = '0'
        AND q.pay_stat = 1
        AND q.col_stat = 1
        AND p.col_custid = %s
        AND q.date_acct = %s ) as succeed) B,
        (SELECT count(order_id) returnNum, sum(amt_paybill) returnAmt
        FROM (SELECT R.ORDER_ID AS ORDER_ID,
        Q.AMT_PAYSERIAL/1000 AS AMT_PAYBILL
        FROM DBPAY.TB_REFUND_BILL R, DBPAY.TB_PAYBILLSERIAL Q
        WHERE R.oid_refundno = Q.OID_BILLNO
         AND R.ORI_COL_ACCTTYPE = 2
         AND R.ORI_COL_TYPE = 1
         AND R.STAT_BILL = 2
         AND Q.PAY_STAT = 1
         AND Q.COL_STAT = 1
         AND R.ORI_COL_CUSTID = %s
         AND Q.DATE_ACCT = %s ) as retur) C,
         (SELECT count(order_id) revokeNum,sum(amt_paybill) revokeAmt
         FROM (SELECT p.order_id as order_id,
         q.amt_payserial/1000 as amt_paybill
         FROM dbpay.tb_pay_bill p, dbpay.tb_paybillserial q
        WHERE p.oid_billno = q.oid_billno
        AND p.paycust_accttype = 2
        AND p.Paycust_Type = 1
        AND p.stat_bill = '4'
        AND q.pay_stat = 1
        AND q.col_stat = 1
        AND p.pay_custid = %s
        AND q.date_acct = %s
        UNION ALL
        SELECT p.order_id as order_id,
        q.amt_payserial/1000 as amt_paybill
        FROM dbpay.tb_pay_bill p, dbpay.tb_paybillserial q
        WHERE p.oid_billno = q.oid_billno
        AND p.col_accttype = 2
        AND p.col_type = 1
        AND p.stat_bill = '4'
        AND q.pay_stat = 1
        AND q.col_stat = 1
        AND p.col_custid = %s
        AND q.date_acct = %s) as revok) D"""
try:
# The connection MySQL The database 
  connDB= MySQLdb.connect("192.168.1.6","root","root","test" )
  connDB.select_db('test')
  curSql1 = connDB.cursor()
# Query merchants 
  curSql1.execute(sqlStr1,checkAcc_date)
  payCustID = curSql1.fetchall()
  if len(payCustID) < 1:
    print ('No found checkbill data,Please check the data for %s!' %checkAcc_date)
    exit(1)
  for row in payCustID:
      custid = row[0]
# Create a summary daily billing file name 
      fileName = '%s/JYMXSUM_%s_%s.csv' %(fileDir,custid,checkAcc_date)
# Determine if the file exists ,  Delete the file if it exists , Otherwise generate file! 
      if os.path.exists(fileName):
        os.remove(fileName)
      print 'The file start generating! %s' %time.strftime('%Y-%m-%d %H:%M:%S')
      print '%s' %fileName
# Open the cursor 
      curSql2= connDB.cursor()
# perform SQL
      checkAcc_date = yestoday.strftime('%Y%m%d')
      curSql2.execute(sqlStr2,(custid,checkAcc_date,custid,checkAcc_date,custid,checkAcc_date,custid,checkAcc_date,c
ustid,checkAcc_date,custid,checkAcc_date,custid,checkAcc_date,custid,checkAcc_date))
# To get the data 
      datesumpay = curSql2.fetchall()
# Open the file 
      outfile = open(fileName,'w')
      for sumpay in datesumpay:
        totalNum = sumpay[0]
        succeedNum = sumpay[1]
        succeedAmt= sumpay[2]
        returnNum = sumpay[3]
        returnAmt = sumpay[4]
        revokeNum = sumpay[5]
        revokeAmt = sumpay[6]
# Generate summary daily billing files 
        outfile.write('%s|%s|%s|%s|%s|%s|%s\n' %(totalNum,succeedNum,succeedAmt,returnNum,returnAmt,revokeNum,revo
keAmt))
      outfile.flush()
      curSql2.close()
  curSql1.close()
  connDB.close()
  print 'The file has been generated! %s' %time.strftime('%Y-%m-%d %H:%M:%S')
except MySQLdb.Error,err_msg:
  print "MySQL error msg:",err_msg

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