為什么我得到這個並非所有參數都在使用python的SQL語句錯誤中使用？

Question

我有一個帶有一個表的mysql數據庫，我正在嘗試使用python從CSV導入該表。

我得到的錯誤是：

mysql.connector.errors.ProgrammingError: Not all parameters were used in the SQL statement

但是我表中只有1個字段，所以我只使用1個參數。

這是MySQL中的表：

desc billing_info;
+-----------+---------+------+-----+---------+-------+
| Field     | Type    | Null | Key | Default | Extra |
+-----------+---------+------+-----+---------+-------+
| InvoiceId | int(11) | NO   |     | NULL    |       |
+-----------+---------+------+-----+---------+-------+

這是我的代碼：

import mysql.connector
import csv
source_dir = 'source_files/aws_bills/'
source_file = 'test_data.csv'
source = source_dir + source_file
mydb = mysql.connector.connect(user='xxxx', password='xxxx',
                            host='xxxx',
                            database='aws_bill')
cursor = mydb.cursor()
csv_data = csv.reader(source)
sql = "INSERT INTO billing_info (InvoiceId) VALUES (%i)"
for row in csv_data:  
    cursor.execute(sql, row)
#close the connection to the database.
mydb.commit()
cursor.close()

Answer 1

您的row變量中包含多個值，也許您是說：

for row in csv_data:  
    cursor.execute(sql, (row[0],))  # a one-tuple with the first element in the row..

同樣，mysql連接器通常希望您將%s用於任何類型的參數，即：

sql = "INSERT INTO billing_info (InvoiceId) VALUES (%s)"

更新：您的第二個問題是您尚未打開文件，即：

import os
import mysql.connector
import csv

# source_dir = 'source_files/aws_bills/'
# source_file = 'test_data.csv'
# source = source_dir + source_file
source = os.path.join('source_files', 'aws_bills', 'test_data.csv')
sql = "INSERT INTO billing_info (InvoiceId) VALUES (%s)"

mydb = mysql.connector.connect(user='xxxx', password='xxxx', host='xxxx', database='aws_bill')
cursor = mydb.cursor()
try:
    with open(source, 'rb') as fp:
        for row in csv.reader(fp):
            cursor.execute(sql, (row[0],))

    cursor.close()
    mydb.commit()
except:
    mydb.rollback()
finally:
    mydb.close()