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Q:
Why does group by in linq to sql not work with rows that are not distinct?
I have a table with three fields: Id, Group, and a value.
I need to group the results by Group, but only if that Group has more than one record.
When I perform this query, and group by Group, all the records with the same Group are being grouped together, even though I am only expecting to group records that have a Group that is not null.
var results = (from result in context.Table1
group result by result.Group into results
select new {Group = results.Key, Items = results});
I'd expect this to work, but it is not.
A:
Try using this:
var results = (from result in context.Table1
group result by result.Group into results
where results.Count() > 1
select new {Group = results.Key, Items = results});
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