更新多列：用户名消失

Question

我正在尝试使用Python和SQLite更新用户详细信息。

目标是一次性升级用户的所有列。

我的代码是：

def update():
  new_username = input("Input your NEW username:\n")
  new_firstname = input("Input your NEW firstname:\n")
  new_lastname = input("Input your NEW lastname:\n")
  new_email = input("Input your NEW email:\n")
  new_password = input("Input your NEW password:\n")
  update_customer =("""UPDATE customer SET username = ? AND firstname = ? AND lastname = ? AND email = ? AND password = ?""")
  cursor.execute(update_customer, [(new_username), (new_firstname), (new_lastname), (new_email), (new_password)])

我在运行python函数之前和之后检查了数据库。但是，所做的更改不会保存到数据库中。除了用户名消失外，什么都没有改变。

Answer 1

您无需使用AND来设置其他列。而是用逗号分隔要设置的列。

所以你想要

update_customer =("""UPDATE customer SET username = ?, firstname = ?, lastname = ?, email = ?, password = ?""")

，如果没有将所有行设置为相同的值，则使用WHERE子句。

按照：-

SQL As Understood By SQLite - UPDATE

Answer 2

完成交易后，您需要保存更改。

cursor = conn.cursor() # Get cursor
cursor.execute(...)    # Execute some SQL queries
# This is the line you've missed.
# You need to call this function every time you update the data in database.
cursor.commit()

此外，“ UPDATE”命令的SQL语法不正确。指定要更改的多个列时，请使用逗号而不是“ AND”。像这样：

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;