mysql - SQLSTATE[42000] : Syntax error or access violation: 1064 in sql select statement

Question

我刚刚开始学习 PHP。我正在尝试做一个非常简单的 sql select 语句-

<?php
    $sql = 'SELECT firstname, lastname,email
           FROM MyGuests
          ORDER BY firstname where id=12';
?>

它给出了以下错误-

Could not connect to the database testdb :SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax;

抱歉，如果这是一个愚蠢的问题。

Answer 1

切换 ORDER BY 和 WHERE 子句:

SELECT firstname,
       lastname,
       email
FROM MyGuests
WHERE id = 12
ORDER BY firstname

这是一个有用的 Stack Overflow 问题，它列出了 MySQL 语句的解释顺序:

MySQL query / clause execution order