如何使用兩行將兩列顯示爲一列？

Question

我有一些問題，我的數據庫查詢：

SELECT 
    a.survey_id, 
    c.questions_first_language ||'-'|| c.questions_second_language as statements, 
FROM survey a 
    LEFT JOIN survey_questions b 
     on a.survey_id = b.survey_id 

列「聲明」怎麼是這樣的：

============================ 
statements 
============================ 
| questions_first_language | 
| questions_second_language| 
|__________________________| 
| questions_third_language | 
| questions_fourth_language| 
|       | 
============================ 

Answer 1

只是兩行呢？這個？

SELECT 
a.survey_id, 
c.questions_first_language ||chr(10)|| c.questions_second_language as statements, 
FROM survey a 
LEFT JOIN survey_questions b 
on a.survey_id = b.survey_id