使用PYMSSQL将值放入SQL Server数据库表

Question

我正在尝试将值放入SQL Server上的数据库表中。

我的程序将订阅MQTT服务器，每当收到消息时，它都会将消息放入数据库表中。

以下是我的代码：

import paho.mqtt.client as mqtt
import signal
import sys
import pymssql
from os import getenv
from time import gmtime, strftime

#Signal Handler
def signal_handler(signal, frame):
    print("\nProgram has been interrupted!")
    sys.exit(0)

#MQTT Subscribe ON_CONNECT
def on_connect(client, userdata, flags, rc):
    if str(rc) == '0':
        print ("Connected Successfully")
    else:
        print ("Connection has a problem")

    #CLIENT SUBSCRIPTION
    client.subscribe("topic1")

#MQTT Subscribe ON_MESSAGE
def on_message(client, userdata, msg):
    print("[" + msg.topic + "] " + str(msg.payload) )
    deviceID = msg.payload
    time = strftime("%Y%m%d%H%M%S", gmtime())
    #Puts the data into the SQL Server DB Table "Topic"
    cursor.execute("""
    IF OBJECT_ID('Topic', 'U') IS NOT NULL
        DROP TABLE Topic
    CREATE TABLE Topic(
        id INT NOT NULL,
        deviceID INT NOT NULL,
        dateTime INT NOT NULL,
        PRIMARY KEY(id)
    )
    """)
    cursor.execute(
        "INSERT INTO Topic VALUES (%d)",
        [(id, deviceID, time)]

    conn.commit()

#Signal Handler
signal.signal(signal.SIGINT, signal_handler)

#Connect to the SQL Server
server = 'mqtt.server.address.com'
user = 'sa'
password = 'pwd'
database = 'topics'

#SQL Server Connection Established
conn = pymssql.connect(server, user, password, database)
cursor = conn.cursor()

#Establishing MQTT Subscribe Connection
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("mqtt.server.address.com", 1883, 60)
client.loop_forever()

我收到了以下错误：

提前感谢您的帮助。

Answer 1

1. 您应该将错误直接发布在问题中。

2. 错误清楚地表明query_params参数应该是一个 元组或字典而不是列表。

   cursor.execute("INSERT INTO Topic VALUES (%d)",
                  [(id, deviceID, time)])
   

   您正在尝试将包含一个元组的列表插入到单个列中。

   另请注意，您在此行中错过了结束)。

   相反，您应该单独插入每个列，并使用元组作为参数：

   cursor.execute("INSERT INTO Topic VALUES (%d, %d, %d)",
                  (id, deviceID, time))