這可以轉換爲LINQ嗎？

Question

我有一個合理長的SQL查詢，我需要在.Net應用程序中運行。我可以使它成爲一個存儲過程，但我希望儘可能避免它（因爲我可能在此應用程序中有大量的查詢）。

考慮到這一點，是否可以像下面的東西轉換爲LINQ或者它是否太詳細？

-- Compare current period to historical data 
select Name , 
     avg(TimeProcessing + TimeRendering + TimeDataRetrieval)/1000 as 'Current Month' , 
     isnull(count(TimeProcessing), 0)        as 'Sample' , 
     min(l2.[Avg_Exec_Time_Previous_Month])       as 'Previous Month' , 
     isnull(min(l2.[Executions_Last_Month]), 0)      as 'Sample' , 
     min(l3.[Avg_Exec_Time_Two_Months_Ago])       as 'Two Months ago' , 
     isnull(min(l3.[Executions_Two_Months_Ago]), 0)     as 'Sample' 
from marlin.report_execution_log l 
     inner join marlin.report_catalog c on l.ReportID = c.ItemID 
     left outer join ( 
         select  
          l2.ReportID , 
          (
          avg(l2.TimeProcessing + l2.TimeRendering 
          + l2.TimeDataRetrieval)/1000 
          ) as 'Avg_Exec_Time_Previous_Month' , 
          count(l2.TimeProcessing) as 'Executions_Last_Month' 
         from  
          marlin.report_execution_log l2 
         where 
          TimeEnd between dateadd(MONTH, -2, getdate()) 
            and  dateadd(MONTH, -1, getdate()) 
         group by 
          l2.ReportID 
         ) l2 on l.ReportID = l2.ReportID 
     left outer join ( 
         select  
          l3.ReportID , 
          (
          avg(l3.TimeProcessing + l3.TimeRendering + l3.TimeDataRetrieval)/1000 
          ) as 'Avg_Exec_Time_Two_Months_Ago' , 
          count(l3.TimeProcessing) as 'Executions_Two_Months_Ago' 
         from 
          marlin.report_execution_log l3 
         where 
          TimeEnd between dateadd(MONTH, -3, getdate()) 
            and  dateadd(MONTH, -2, getdate()) 
         group by 
          l3.ReportID 
         ) l3 on l.ReportID = l3.ReportID 
group by l.ReportID , 
      Name 
order by 2 desc 

Answer 1

有許多工具/轉換器可在互聯網上。您可以使用此工具

• 爲什麼不試試Sql to Linq
• LinqPad