Selecting Consecutive Entries with LINQ to Entities

Question

I have a database table with rows that each contain a sequential index. I want to select groups of rows that are consecutive based upon this index column. For example, if I

Answer 1

using (var model = new AlbinTestEntities())
{
    var triples = from t1 in model.Numbers
                  from t2 in model.Numbers
                  from t3 in model.Numbers
                  where t1.Number + 1 == t2.Number
                  where t2.Number + 1 == t3.Number
                  select new
                  {
                      t1 = t1.Number,
                      t2 = t2.Number,
                      t3 = t3.Number,
                  };

    foreach (var res in triples)
    {
        Console.WriteLine(res.t1 + ", " + res.t2 + ", " + res.t3);
    }
}

It generates the following SQL

SELECT 
[Extent1].[Number] AS [Number], 
[Extent2].[Number] AS [Number1], 
[Extent3].[Number] AS [Number2]
FROM   [dbo].[Numbers] AS [Extent1]
CROSS JOIN [dbo].[Numbers] AS [Extent2]
CROSS JOIN [dbo].[Numbers] AS [Extent3]
WHERE (([Extent1].[Number] + 1) = [Extent2].[Number]) AND (([Extent2].[Number] + 1) = [Extent3].[Number])

It might be even better to use an inner join like this

using (var model = new AlbinTestEntities())
{
    var triples = from t1 in model.Numbers
                  join t2 in model.Numbers on t1.Number + 1 equals t2.Number
                  join t3 in model.Numbers on t2.Number + 1 equals t3.Number
                  select new
                  {
                      t1 = t1.Number,
                      t2 = t2.Number,
                      t3 = t3.Number,
                  };

    foreach (var res in triples)
    {
        Console.WriteLine(res.t1 + ", " + res.t2 + ", " + res.t3);
    }
}

but when I compare the resulting queries in management studio they generate the same execution plan and take exactly the same time to execute. I have only this limited dataset you might compare the performance on your dataset if it is larger and pick the best if they differ.