如何在 SQL (Snowflake) 中连接不同行中的两个字符串？

Question

所以我在Snowflake中有如下数据：

   Question       Answer    ID
First name?         John   001
 Last name?        Smith   001
First name?         Avon   002
 Last name?    Barksdale   002
First name?     Stringer   003
 Last name?         Bell   003

下面有没有CONCATENATE这些？

ID       Full_Name
001     John Smith
002 Avon Barksdale
003  Stringer Bell

Answer 1

您可以使用条件聚合：

select id,
       concat_ws(' ',
                 (case when question = 'First name?' then answer end),
                 (case when question = 'Last name?' then answer end)
                ) as fullname
from t
group by id

Answer 2

您可以为此使用 listagg：

SELECT listagg(answer,' ') WITHIN GROUP (ORDER BY question)
FROM x
GROUP BY id;