[英]How to get two values from the two different tables in the same SQL
我有两张桌子
问题
答案
如果我使用此查询,
select q.question, a.answer from Question q, Answers a where q.Id_question= a.Id_question
我得到了问题和相关的答案,但例如我重复了问题
题
First question?
Yes
First question?
No
Second question?
Probably
Second question?
Yei
是否有可能获得第一个问题和相关的答案,然后获得第二个问题和相关的答案而没有重复的问题?
尚不清楚输出中要查找的内容,但可以尝试如下操作:
select q.question, group_concat(a.answer)
from Question q, Answers a
where q.Id_question= a.Id_question
group by q.question
group_concat
函数将为您提供一个逗号分隔的列表。 输出应如下所示:
First question? | Yes, No
Second question? | Probably, Yei
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