Question

I have this query and I can’t found out how to this in Lambda expression.

select * from NewsVersion nv
left outer join ChangeProcess cp on cp.DocumentId = nv.NewsId and cp.EndDate is null
where nv.NewsId = 'B2301B7F-D37E-4CF5-9392-01844564BFCC'

Anyone have an idea?

Thanks

Answer 1

I’m not 100% sure and a bit confused about why Thomas Levesque thinks this is not an equijoin (after all NewsId == DocumentId is an equality comparison), but I don’t see why this shouldn’t work:

var query =
from nv in db.NewsVersion
join cp in db.ChangeProcess on nv.NewsId equals cp.DocumentId into joined
from j in joined.Where(x => x.EndDate == null).DefaultIfEmpty()
where nv.NewsId = "B2301B7F-D37E-4CF5-9392-01844564BFCC"
select new { NewsVersion = nv, ChangeProcess = j };

EDIT: corrected, according to the OP’s comment