Python MySQL 更新查询

Question

我正在尝试根据用户输入更新 SQL 表我有以下代码。用户可以选择输入/更改以下默认为 SQL 表中的值的字段。但是，当我运行代码时，我收到以下错误消息

mysql.connector.errors.ProgrammingError: SQL 语句的参数不足

我数了很多次，似乎 %s 与传递的参数匹配。我错过了什么吗？

user = User_name_body.get('1.0',END)
passw = Password_text.get('1.0',END)
first = First_name.get('1.0',END)
last = Last_name.get('1.0',END)
phone = Phone_number.get('1.0',END)
email = Email_address.get('1.0',END)
mycursor = mydb.cursor()

sql = "UPDATE t_users SET Email_address=%s, First_name=%s, Last_name=%s, Phone_Number=%s, Password=%s WHERE User_Name=%s VALUES(%s,%s,%s,%s,%s,%s)"
val = (email, first, last, phone, passw,user)

mycursor.execute(sql, val)
mydb.commit()
mydb.close()

Answer 1

UPDATE 不带 VALUES，您应该将您的 sql 查询行更改为如下所示：

sql = "UPDATE t_users SET Email_address=%s, First_name=%s, Last_name=%s, Phone_Number=%s, Password=%s WHERE User_Name=%s"

Python 会抛出一个错误，因为您要求 12 个参数并且只提供 6 个。

Answer 2

像这样准备你的 sql 数据：

sql = """ UPDATE t_users SET Email_address=%s, First_name=%s, Last_name=%s, Phone_Number=%s, Password=%s WHERE User_Name = %s """

val = (email, first, last, phone, passw, user)

mycursor.execute(sql, val)

或者你可以这样做

sql = "UPDATE btms_users SET btms_users.user='%s', btms_users.secret='%s' , btms_users.first_name='%s', " \
                      "btms_users.second_name='%s', btms_users.email='%s', btms_users.mobile='%s' " \
                      "WHERE btms_users.id='%s'" % (user_name, user_secret, user_firstname, user_lastname,
                                                    user_email, user_phone, user_id)
    
mycursor.execute(sql)

这是一个完整的工作示例：

import mysql.connector

mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  password="test",
  database="test"
)

mycursor = mydb.cursor()

sql = "UPDATE items SET name = %s WHERE id = %s"
val = ("Test", 1)

mycursor.execute(sql, val)

mydb.commit()

print(mycursor.rowcount, "record(s) affected")