MySQL Query返回奇怪的值

Question

该查询应该执行以下操作：

  

根据问题的识别号码获取问题和相关答案。 （在这种情况下，标识号称为account_id。对它们进行排序，以便每个问题（以及它的相应答案）按顺序排列。

查询：

SELECT * 
  FROM quiz_questions q
 JOIN quiz_answers a
    ON q.account_id = a.account_id
WHERE q.account_id = 1840979156127491
ORDER BY q.question_id
ASC LIMIT 5

quiz_questions表和内容：

quiz_answers表和内容：

奇怪的改变结果：

正如您可以看到question_id的排序位置，所有值都是1但是，另一个question_id字段（如果您查看以前的数据，这些字段匹配）代表两个，就像它们应该的那样。此外，即使问题（id为2）显示在辅助question_id字段中，问题的文本仍属于问题1：（do you like waffles）与（do you like pancakes）相关联。 / p>

导致这些结果的原因是什么？以下是预期结果的样子:(忽略重复字段）。

+------------------+-------------+----------------------+-----------+----------------------+---------+
|    account_id    | question_id |       question       | answer_id |        answer        | correct |
+------------------+-------------+----------------------+-----------+----------------------+---------+
| 1840979156127491 |           1 | Do you like waffles  |         1 | Yes i like waffles   |       1 |
| 1840979156127491 |           1 | Do you like waffles  |         5 | I kinda like waffles |       1 |
| 1840979156127491 |           1 | Do you like waffles  |         6 | Not at all           |       0 |
| 1840979156127491 |           2 | Do you like pancakes |         7 | Yes                  |       1 |
| 1840979156127491 |           2 | Do you like pancakes |         8 | No           |       0 |
+------------------+-------------+----------------------+-----------+----------------------+---------+

Answer 1

您需要account_id以及question_id

加入

SELECT * FROM `quiz_questions`
INNER JOIN `quiz_answers` 
ON `quiz_questions`.`account_id` = `quiz_answers`.`account_id`
  AND `quiz_questions`.`question_id` = `quiz_answers`.`question_id`
WHERE `quiz_questions`.`account_id` = '1840979156127491'
ORDER BY `quiz_questions`.`question_id`
ASC LIMIT 5