SQL ServerクエリをROW_NUMBER（）とOVERを持つC＃LINQに変換する

Question

このクエリをC＃LINQ に変換する必要がありますが、どのように開始するのか分かりません。あなたの時間をありがとう。

SELECT s.TextId, s.Title, s.CategoryId, s.Name, s.DateSent, Row 
FROM 
    (SELECT t.TextId, t.Title, t.CategoryId, c.Name, t.DateSent, 
     ROW_NUMBER() OVER (PARTITION BY t.CategoryId ORDER BY t.datesent DESC) AS Row 
    FROM Concept_Text t 
    JOIN Concept_Text_Categories c 
     ON t.CategoryId = c.CategoryId 
    JOIN Concept_Text_CategoryToPlugin cp 
     ON c.CategoryId = cp.CategoryId 
    JOIN Concept_Text_Plugins p 
     ON cp.PluginId = p.PluginId 
    WHERE p.type = 12 AND (t.IsPublished = 'True') AND (Visible = 'True') 
    GROUP BY t.TextId, t.Title, t.CategoryId, c.Name, t.DateSent) s 
WHERE Row <=12 

は助けを借りて、これまでのところ、私はこの

(from t in Concept_Text 
    join c in Concept_Text_Categories on t.CategoryId equals c.CategoryId 
    join cp in Concept_Text_CategoryToPlugin on c.CategoryId equals cp.CategoryID 
    join p in Concept_Text_Plugins on cp.PluginID equals p.PluginID 
    where p.Type == 12 && t.IsPublished && t.Visible 
    group cp by new { t.TextId, t.Title, t.CategoryId, c.Name, t.DateSent } into gr 
    orderby gr.Key.DateSent descending 
    select new 
    { 
     gr.Key.TextId, 
     gr.Key.Title, 
     gr.Key.CategoryId, 
     gr.Key.Name, 
     gr.Key.DateSent 
    }) 

唯一の問題は、今私たちは、各カテゴリの12 enteriesを取得する必要がありました。

Answer 1

(from c in Concept_Text_Categories 
          join cp in Concept_Text_CategoryToPlugin 
          on c.CategoryId equals CategoryID 
          join p in Concept_Text_Plugins 
          on PluginID equals p.PluginID 
          where p.Type == 12 
          && c.Enabled 
          && p.Enabled 
          orderby c.Name ascending 
          select new() 
          { 
           CategoryId = c.CategoryId, 
           Name = c.Name, 
           Materias = (from t in Concept_Text 
             where t.CategoryId == c.CategoryId 
             && t.IsPublished 
             && t.Visible 
             orderby t.DateSent 
             select new() 
             { 
              TextId = t.TextId, 
              Title = t.Title 
             }).Take(12) 
          }) 

Answer 2

私はこのようなものだと思う：

var query = 
(
    from t in Concept_Texts 
    join c in Concept_Text_Categories on t.CategoryId equals c.CategoryId 
    join cp in Concept_Text_CategoryToPlugin on c.CategoryId equals cp.CategoryId 
    join p in Concept_Text_Plugins on cp.CategoryId equals p.CategoryId 

    where p.type = 12 && t.IsPublished == "True" AND t.Visible == "True" 
    group cp by new {t.TextId, t.Title, t.CategoryId, c.Name, t.DateSent} into gr 
    select new { 
       gr.Key.TextId, 
       gr.Key.Title, 
       gr.Key.CategoryId, 
       gr.Key.Name, 
       gr.Key.DateSent, 
       MinC = gr.Min(gcp=>gcp.CategoryId }, 
       MaxC = gr.Max(gcp=>gcp.CategoryId } 
).Where(c=>c.CategoryId >= c.MinC && c.CategoryId <= c.MaxC) 
.OrderByDescending(c=>c.DateSent) 
.Skip(0).Take(12); 

あなたはLINQパッドでこれをテストすることができますか？ SQLが生成するものを参照してください。