如果指定了SELECT DISTINCT，則ORDER BY項目必須出現在選擇列表中錯誤

Question

我需要按某種方式列出某個字段，但對其進行了不同的排序。這是查詢。任何方式在這個？

SELECT DISTINCT tsgroup 
FROM master 
ORDER BY RIGHT(RTRIM(tsgroup), 3), 
      LEFT(rtrim(tsgroup), 3) 

Answer 1

您可以使用GROUP BY代替

SELECT tsgroup 
FROM master 
GROUP BY tsgroup 
ORDER BY RIGHT(RTRIM(tsgroup), 3), 
      LEFT(RTRIM(tsgroup), 3) 

Answer 2

像一個黑客：

select grp from (
select distinct tsgroup as grp 
from master 
) 
order by RIGHT(RTRIM(grp), 3) , left(rtrim(grp), 3)