Python 循环数据库行并将字段复制到另一个字段中

MySQL数据库表“帐户”

如果row

name

为空，如何用Python编写一个脚本，循环该表（accounts）中的所有行，并将值从row

id

复制到row

name

经过一番阅读，我终于得到了一些代码：

import mysql.connector


db = mysql.connector.connect(
    host="localhost",
    user="user",
    passwd="pass",
    database="mydatabase"
)

db_pointer = db.cursor()

db_pointer.execute("SELECT * FROM accounts")

result = db_pointer.fetchall()

for x in result:
    print(x)

例如，如何读取每行中“电子邮件”的值？比如：

for x in result:
    print(x.email)

---

提前感谢

以下代码将为您提供一个工作示例，说明您正在寻找的内容

import mysql.connector


db = mysql.connector.connect(
    host="localhost",
    user="user",
    passwd="pass",
    database="mydatabase"
)

db_pointer = db.cursor()

db_pointer.execute("SELECT id, ISNULL(name, '') FROM accounts")

result = db_pointer.fetchall()

for x in result:
    #assuming that the SELECT query is returned properly x[0] is the id and x[1] is the name
    if (x[1] == ""):
       #we also assume that id is a primary key
       db_pointer2 = db.cursor()
       db_pointer2.execute("INSERT INTO accounts SET name = '" + x[0] + "' WHERE id = '" + x[0] + "'")

每个查询结果行都是一个数组，使用

array[index]

---

方法。

到目前为止，您尝试了什么？请向我们展示您的尝试。我的尝试在问题中很清楚。。。对于结果中的x：打印（x.email）