Question

我正在使用Python而我正在尝试从同一个数据库（name = begin）中的两个mySQL表（name = deal_info和profile）中检索数据。这两个表没有链接或没有相同的主键，但我收到错误

  raise errors.InternalError("Unread result found.")
mysql.connector.errors.InternalError: Unread result found.

以下是代码

import mysql.connector
from decimal import *

cnx = mysql.connector.connect(user='root', password = 'xxx', database='begin')
cursor = cnx.cursor()

query_deal_info = ("SELECT mrp, qty_remain, deal_price, qty, asp FROM deal_info WHERE deal_id = %s")
deal_id = int(input("Enter the deal id:"))
cursor.execute(query_deal_info,(deal_id,))
query_profile = ("SELECT user_id, abp1, abp2, abp3, abpf FROM profile WHERE user_id = %s")
user_id = int(input("Enter the user id:"))
cursor.execute(query_profile,(user_id,))

for (mrp, qty_remain, deal_price, qty, asp) in cursor:
 print("The MRP for the deal is {}".format(mrp))
 print ("The deal price is {}, asp is {} and qty is {}".format(deal_price, asp, qty))

for (user_id, abp1) in cursor:
  print("The ABP1, 2, 3 and f for the deal is {}, {}".format(user_id, abp1))

cursor.close()
cnx.close()

Answer 1

根据MySQL.connector docs，您需要在执行任何其他语句之前获取结果：

在这种情况下，您必须确保获取结果集的所有行在执行同一连接上的任何其他语句之前，或者将引发InternalError（未读结果）异常。

只需在cursor.execute()之后运行您的循环打印行：

cnx = mysql.connector.connect(user='root', password = 'xxx', database='begin')
cursor = cnx.cursor()

# DEAL INFO
query_deal_info = "SELECT mrp, qty_remain, deal_price, qty, asp \
                    FROM deal_info WHERE deal_id = %s"
deal_id = int(input("Enter the deal id:"))
cursor.execute(query_deal_info,(deal_id,))

for (mrp, qty_remain, deal_price, qty, asp) in cursor:
    print("The MRP for the deal is {}".format(mrp))
    print ("The deal price is {}, asp is {} and qty is {}".format(deal_price, asp, qty))

# PROFILE
query_profile = "SELECT user_id, abp1, abp2, abp3, abpf \
                  FROM profile WHERE user_id = %s"
user_id = int(input("Enter the user id:"))
cursor.execute(query_profile,(user_id,))

for (user_id, abp1) in cursor:
    print("The ABP1, 2, 3 and f for the deal is {}, {}".format(user_id, abp1))

cursor.close()    
cnx.close()

从两个MySQL表中检索Python中的数据？

1 个答案: