如果指定了SELECT DISTINCT，则ORDER BY项目必须出现在选择列表中错误

Question

我需要按某种方式列出某个字段，但对其进行了不同的排序。这是查询。任何方式在这个？

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

像一个黑客：

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