LINQ to SQL-Gruppe Durch die Verwendung und Reihenfolge von Graf

Question

Dies ist mysql query:

SELECT count(PVersion), PVersion 
    FROM [Products].[dbo].[Active_Details] 
group by PVersion 
order by count(PVersion); 

Was wird seine LINQ to SQL sein.

Answer 1

Sollte eine Gruppe in sein:

var product = (
    from p in yourContext.Active_Details 
    group p by p.PVersion into pgroup 
    select new { VersionCount= pgroup.Count(), pgroup.Key } 
).OrderBy(x=>x.VersionCount); 

Hier ist ein MSDN Resource mit Beispielen

Answer 2

Versuchen Sie folgendes:

var product = 
      from p in yourContext.Active_Details 
      group p by p.PVersion into pgroup 
      let count = pgroup.Count() 
      orderby count 
      select new { Count = count, PVersion = pgroup.Key }; 

SELECT count(ProductVersion), ProductVersion , ProductID , SubProductID 
FROM [do-not-delete-accounts].[dbo].[Activation_Details] 
group by ProductVersion,ProductID,SubProductID 
order by count(ProductVersion); 

var query = 
      from p in yourContext.Activation_Details 
      group p by new 
      { 
       ProductVersion = p.ProductVersion, 
       ProductID = p.ProductID, 
       SubProductID = p.SubProductID 
      } 
      into pgroup 
      let count = pgroup.Count() 
      orderby count 
      select new 
      { 
       Count = count, 
       ProductVersion = pgroup.Key.ProductVersion, 
       ProductID = pgroup.Key.ProductID, 
       SubProductID = pgroup.Key.SubProductID 
      };