CONCAT多個行​​與SQL

Question

我有這個表結果

team_id | match_id | result 
---------------------------- 
1  |13  | 1-1 
1  |13  | 2-0 
1  |13  | 0-3 

我想改變它在這個

team_id | match_id | result | result 2 | result 3 
-------------------------------------------------- 
1  |13  | 1-1 | 2-0 | 0-3 

Answer 1

如果排序是任意的，恰好有THRE，那麼你可以使用有條件的聚合：

select team_id, max(case when seqnum = 1 then result end) as result1, 
     max(case when seqnum = 2 then result end) as result2, 
     max(case when seqnum = 3 then result end) as result3 
from (select t.*, 
      row_number() over (partition by team_id order by team_id) as seqnum 
     from t 
    ) t 
group by team_id;