Question

我遇到问题我有一个代码可以生成一个选择查询：

loginquery = "SELECT * from User "
loginquery = loginquery + "WHERE UserName="+ loginVar.get() +" AND Password="+ passVar.get()+""

问题是结果是 SELECT *来自用户WHERE UserName = AND Password =

我该如何解决？

EDIT :::::

这是我的代码

loginquery = ("SELECT * from User "
              "WHERE UserName=%s AND Password=%s")
bobby = (loginVar.get(),passVar.get())

我做了

(query.execute(loginquery % bobby)

我的打印结果是：

SELECT * from User WHERE UserName = usernameentered AND Password = passwordentered

然而，mysql连接器出现了这个错误：

mysql.connector.errors.ProgrammingError: 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND Password=' at line 1

为什么？

Answer 1

您应该在字符串文字周围添加引号：

loginquery = ("SELECT * from User "
              "WHERE UserName='%s' AND Password='%s'")

将变量设置为stringvar.get（）

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