如何使用sqlite3从csv文件将数据导入python 3.4中的数据库

Question

我目前正在为我的A级计算机课程编写程序。 我正在尝试使用Python 3.4中的sqlight3将csv文件中的数据导入数据库。 我已经尝试了一些示例，但是我似乎无法使它们中的任何一个起作用。 我对python的了解很少，因此将不胜感激。

import sqlite3
new_db = sqlite3.connect(':memory:')
c=new_db.cursor()
import csv


c.execute('''CREATE TABLE data
(settlement_id,
settlement_start_date,
settlement_end_date,
deposit_date,
total_amount,
currency,
transaction_type,
order_id,
merchant_order_id,
adjustment_id,
shipment_id,
marketplace_name,
amount_type,
amount_description,
amount,
fulfillment_id,
posted_date,
posted_date_time,
order_item_code,
merchant_order_item_id,
merchant_adjustment_item_id,
sku,
quantity_purchased,
promotion_id)
''')


with open('testdata1.csv', newline='') as f:
reader = csv.reader(f)
for column in reader:
    settlement_id = column[0]
    settlement_start_date = column[1]
    settlement_end_date = column[2]
    deposit_date = column[3]
    total_amount = column[4]
    currency = column[5]
    transaction_type = column[6]
    order_id = column[7]
    merchant_order_id = column[8]
    adjustment_id = column[9]
    shipment_id = column[10]
    marketplace_name = column[11]
    amount_type = column[12]
    amount_description = column[13]
    amount = column[14]
    fulfillment_id = column[15]
    posted_date = column[16]
    posted_date_time = column[17]
    order_item_code = column[18]
    merchant_order_item_id = column[19]
    merchant_adjustment_item_id = column[20]
    sku = column[21]
    quantity_purchased = column[22]
    promotion_id = column[23]


    c.execute('''INSERT into data (settlement_id,settlement_start_date,settlement_end_date,deposit_date,total_amount,currency,transaction_type,order_id,merchant_order_id,adjustment_id,shipment_id,marketplace_name,amount_type,amount_description,amount,fulfillment_id,posted_date,posted_date_time,order_item_code,merchant_order_item_id,merchant_adjustment_item_id,sku,quantity_purchased,promotion_id)
              values (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)''',
              (settlement_id,settlement_start_date,settlement_end_date,deposit_date,total_amount,currency,transaction_type,order_id,merchant_order_id,adjustment_id,shipment_id,marketplace_name,amount_type,amount_description,amount,fulfillment_id,posted_date,posted_date_time,order_item_code,merchant_order_item_id,merchant_adjustment_item_id,sku,quantity_purchased,promotion_id))
    db.commit()



new_db.close()

每次我运行代码时，都会返回以下错误消息：

追溯（最近一次通话）：文件“ G：\\ Computing \\ A2 \\ Coursework \\ SQL2.py”，第66行，位于（settlement_id，settlement_start_date，settlement_end_date，deposit_date，total_amount，货币，transaction_type，order_id，merchant_order_id，adjustment_id，运输，marketplace_name，amount_type，amount_description，amount，fulfillment_id，posted_date，posted_date_time，order_item_code，merchant_order_item_id，merchant_adjustment_item_id，sku，quantity_purchased，promotion_id））语法错误：％“ OperationalError：

我了解语法不正确，我正在寻找一种将数据插入适当列的方法。

Answer 1

该文件说：

参数可以采用几种形式：
？ 神经网络
？
： AAAA
@ AAAA
$ AAAA

%s不是其中之一。

Answer 2

似乎您缺少％运算符。 您将处于昏迷状态，这将导致错误。

更改为此：

c.execute('''INSERT into data (settlement_id,settlement_start_date,settlement_end_date,deposit_date,total_amount,currency,transaction_type,order_id,merchant_order_id,adjustment_id,shipment_id,marketplace_name,amount_type,amount_description,amount,fulfillment_id,posted_date,posted_date_time,order_item_code,merchant_order_item_id,merchant_adjustment_item_id,sku,quantity_purchased,promotion_id)
              values (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)''' %  (settlement_id,settlement_start_date,settlement_end_date,deposit_date,total_amount,currency,transaction_type,order_id,merchant_order_id,adjustment_id,shipment_id,marketplace_name,amount_type,amount_description,amount,fulfillment_id,posted_date,posted_date_time,order_item_code,merchant_order_item_id,merchant_adjustment_item_id,sku,quantity_purchased,promotion_id))

％运算符将传递值。

话虽如此，％运算符正在逐渐摆脱Pyhton 3的困扰，而应该使用format命令。

实际上，您的代码可以大大改善，如下所示：

with open('testdata1.csv', newline='') as f:
    reader = csv.reader(f)
    for column in reader:
        c.execute('INSERT into data VALUES {}'.format(column))
    new_db.commit()