SQL Server 2005，SELECT DISTINCT查询

Question

如何修改此查询以返回不同的Models和VideoProcessor列？

SELECT TOP(20) * 
FROM 
    (SELECT 
     [3D_Benchmarks].Id AS BenchmarkId, 
     Manufacturer, Model, Slug, VideoProcessor, 
     FPS, CPU 
    FROM 
     [3D_Benchmarks] 
    JOIN 
     [3D_Slugs] ON [3D_Benchmarks].Id = [3D_Slugs].BenchmarkId) AS tb 
ORDER BY 
    tb.FPS DESC; 

Answer 1

根据您的评论提出的新答案。这查找了二十个最高的FPS Model + VideoProcessor。对于其中的每一个，它会选择FPS最高的那一行。

select details.Model 
,  details.VideoProcessor 
,  details.FPS 
,  <add other columns here> 
from (
     select top 20 b.Model 
     ,  VideoProcessor 
     from [3D_Benchmarks] b 
     join [3D_Slugs] s 
     on  b.Id = s.BenchmarkId 
     group by 
       b.Model 
     order by 
       max(b.FPS) desc 
     ) top20 
cross apply 
     (
     select top 1 * 
     from [3D_Benchmarks[ b 
     join [3D_Slugs] s 
     on  b.Id = s.BenchmarkId 
     where b.Model = top20.Model 
       and b.VideoProcessor = top20.VideoProcessor 
     order by 
       b.FPS desc 
     ) details