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

So I think I've come up with a pretty good solution modeled after Brian's answer in the topic I linked to.

var q = from a in query
        from b in query
        where a.Index < b.Index
        && b.Index < a.Index + 3
        group b by new { a.Index }
            into myGroup
            where myGroup.Count() + 1 == 3
            select myGroup.Key.Index;

Change 3 to the number of consecutive rows you want. This gives you the first index of every group of consecutive rows. Applied to the original example I provided, you would get:

3
9
10