Python MySQLdb执行表插入
我是MySql和MySQLdb的新手。但是我已经试了几个小时来解决这个问题 我有一张这样的桌子:Python MySQLdb执行表插入,python,mysql,mysql-python,Python,Mysql,Mysql Python,我是MySql和MySQLdb的新手。但是我已经试了几个小时来解决这个问题 我有一张这样的桌子: > Traceback (most recent call last): File > "C:\Users\Emil\Desktop\flaskr\flaskr.py", line 29, in <module> > cur.execute(str % ('admin', 'password')) File "C:\Python27\lib\site-p
> Traceback (most recent call last): File
> "C:\Users\Emil\Desktop\flaskr\flaskr.py", line 29, in <module>
> cur.execute(str % ('admin', 'password')) File "C:\Python27\lib\site-packages\MySQLdb\cursors.py", line 202, in
> execute
> self.errorhandler(self, exc, value) File "C:\Python27\lib\site-packages\MySQLdb\connections.py", line 36, in
> defa lterrorhandler
> raise errorclass, errorvalue
> _mysql_exceptions.ProgrammingError: (1064, "You have an error in your SQL synta ; check the manual that corresponds to your MySQL server
> version for the right yntax to use near ''id', 'username', 'password')
> VALUES (NULL, admin, password) at line 1")
mysql>描述用户
代码部分:
def connect_db():
conn = MySQLdb.connect(user='root',
passwd='',
db='flask',
host='localhost')
return conn
cur = connect_db().cursor()
cur.execute("DROP TABLE IF EXISTS users")
cur.execute("CREATE TABLE users(id INT PRIMARY KEY AUTO_INCREMENT, \
username VARCHAR(25), password VARCHAR(25))")
str = "INSERT INTO users ('id', 'username', 'password') VALUES (NULL, %s, %s)"
cur.execute(str % ('admin', 'password'))
我犯了这样一个错误:
> Traceback (most recent call last): File
> "C:\Users\Emil\Desktop\flaskr\flaskr.py", line 29, in <module>
> cur.execute(str % ('admin', 'password')) File "C:\Python27\lib\site-packages\MySQLdb\cursors.py", line 202, in
> execute
> self.errorhandler(self, exc, value) File "C:\Python27\lib\site-packages\MySQLdb\connections.py", line 36, in
> defa lterrorhandler
> raise errorclass, errorvalue
> _mysql_exceptions.ProgrammingError: (1064, "You have an error in your SQL synta ; check the manual that corresponds to your MySQL server
> version for the right yntax to use near ''id', 'username', 'password')
> VALUES (NULL, admin, password) at line 1")
>回溯(最近一次调用上次):文件
>“C:\Users\Emil\Desktop\flaskr\flaskr.py”,第29行,在
>cur.execute(str%('admin','password'))文件“C:\Python27\lib\site packages\MySQLdb\cursors.py”,第202行,在
>执行
>errorhandler(self,exc,value)文件“C:\Python27\lib\site packages\MySQLdb\connections.py”,第36行,在
>德法尔特罗汉德勒酒店
>提高errorclass,errorvalue
>\u mysql\u exceptions.ProgrammingError:(1064,“您的SQL语法中有错误;请检查与您的mysql服务器对应的手册
>在“id”、“用户名”、“密码”附近使用的yntax权限的版本)
>第1行的值(NULL、admin、password)
我想我的INSERT命令有问题。我不知道该怎么做,并且已经尝试在谷歌上搜索可能有帮助的内容。以下是使用当前解决方案得到的查询结果:
INSERT INTO users ('id', 'username', 'password') VALUES (NULL, admin, password)
如您所见,admin
和password
周围没有引号-这就是编程错误
异常的原因
除此之外,通过字符串格式插入查询参数会使代码容易受到SQL注入的攻击
相反,参数化查询:
query = """
INSERT INTO
users
('id', 'username', 'password')
VALUES
(NULL, %s, %s)
"""
cur.execute(query, ('admin', 'password'))