Php 我可以按另一个表中的记录数对SQL查询结果进行排序吗？

大概是这样的：

SELECT count(Answers.ID) as answertotal, Questions.* 
FROM Questions 
LEFT JOIN Answers ON Answers.qid=Questions.ID 
ORDER BY answertotal

SELECT q.*, tots.answertotal
FROM Questions q
INNER JOIN ( 
  SELECT count(Answers.ID) as answertotal, Questions.ID as questionid
  FROM Questions 
  LEFT JOIN Answers ON Answers.qid=Questions.ID 
  GROUP BY Questions.ID
) tots ON tots.questionid = q.ID
ORDER BY tots.answertotal

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我正在使用SQLite，但任何示例都会有所帮助。

在MySQL中，这将起作用：

SELECT count(Answers.ID) as answertotal, Questions.* 
FROM Questions 
LEFT JOIN Answers ON Answers.qid=Questions.ID 
GROUP BY Questions.ID
ORDER BY answertotal

在SQLLite中，您可能需要添加一个额外的层，如下所示：

SELECT count(Answers.ID) as answertotal, Questions.* 
FROM Questions 
LEFT JOIN Answers ON Answers.qid=Questions.ID 
ORDER BY answertotal

SELECT q.*, tots.answertotal
FROM Questions q
INNER JOIN ( 
  SELECT count(Answers.ID) as answertotal, Questions.ID as questionid
  FROM Questions 
  LEFT JOIN Answers ON Answers.qid=Questions.ID 
  GROUP BY Questions.ID
) tots ON tots.questionid = q.ID
ORDER BY tots.answertotal

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当前查询中失败的是什么？