SQL Query有什么问题？

Question

如何修复此SQL查询？

$q = $db->sqlQuery("SELECT * FROM project WHERE email = " . $email . "");

Answer 1

$q = $db->sqlQuery("SELECT * FROM project WHERE email = '" . $email . "'");

Answer 2

$q = $db->sqlQuery("SELECT * FROM project WHERE email = '$email'");

Answer 3

你可以试试这个：

$q = $db->sqlQuery("SELECT * FROM project WHERE email = '" . $email . "'");

它缺少单引号'，它应该包含$email值，因为它是一个字符串。

Answer 4

$q = $db->sqlQuery("SELECT * FROM project WHERE email = '" . $email . "'");

您需要使用''作为字符串变量

错误：SELECT * FROM project WHERE email = email@email.email

好的：SELECT * FROM project WHERE email = 'email@email.email'

Answer 5

转义参数。

$q = $db->sqlQuery("SELECT * FROM project WHERE email = '" . $email . "'");