任何人都能帮我处理这个SQL查询吗(在sqlite db browser中工作,但在rails中不工作)

Rails一直在向我吐:

SQLite3::SQLException: near "SELECT": syntax error: 
        SELECT questions.id, questions.text, questions.question_type_id, questions.meta, questions.max_answer_length,
          COUNT(form_questions.id) AS expr1,
          (5) AS expr2,
          CAST(COUNT(form_questions.id) AS REAL) / CAST((5) AS REAL) AS expr3
        FROM questions, form_questions
        WHERE form_questions.question_id = questions.id
        GROUP BY questions.id, questions.text, questions.question_type_id, questions.meta, questions.max_answer_length
        HAVING expr3 >= 0.75
        ORDER BY COUNT(form_questions.id) DESC; 

查询正确执行,在SQLite数据库浏览器中没有任何问题,但出于某种原因,Rails正在回避它。

代码是:

  def self.find_by_commonality
    Question.find_by_sql(%&
        SELECT questions.id, questions.text, questions.question_type_id, questions.meta, questions.max_answer_length,
          COUNT(form_questions.id) AS expr1,
          (5) AS expr2,
          CAST(COUNT(form_questions.id) AS REAL) / CAST((5) AS REAL) AS expr3
        FROM questions, form_questions
        WHERE form_questions.question_id = questions.id
        GROUP BY questions.id, questions.text, questions.question_type_id, questions.meta, questions.max_answer_length
        HAVING expr3 >= 0.75
        ORDER BY COUNT(form_questions.id) DESC; & % [])
  end

世界跆拳道会抱怨什么?