“linq links Join Group von” Code-Antworten

Linq links join

IQueryable<Job> jobs = (from j in _db.Jobs

                join jt in _db.JobTranslators on j.Id equals jt.JobId into jts
                from jtResult in jts.DefaultIfEmpty()

                join jr in _db.JobRevisors on jtResult.Id equals jr.JobId into jrs
                from jrResult in jrs.DefaultIfEmpty()


                join u in _db.Users on jtResult.UserId equals u.Id into jtU
                from jtUResult in jtU.DefaultIfEmpty()

                where jtUResult.Id == userId

                orderby j.Id

                select j).Concat(
                from j in _db.Jobs

                join jt in _db.JobTranslators on j.Id equals jt.JobId into jts
                from jtResult in jts.DefaultIfEmpty()

                join jr in _db.JobRevisors on jtResult.Id equals jr.JobId into jrs
                from jrResult in jrs.DefaultIfEmpty()

                join u in _db.Users on jrResult.UserId equals u.Id into jrU
                from jrUResult in jrU.DefaultIfEmpty()

                where jtUResult.Id == userId

                orderby j.Id

                select j
                ).Distinct()

Quaint Quoll

linq links Join Group von

from p in context.ParentTable
join c in context.ChildTable on p.ParentId equals c.ChildParentId into j1
from j2 in j1.DefaultIfEmpty()
group j2 by p.ParentId into grouped
select new { ParentId = grouped.Key, Count = grouped.Count(t=>t.ChildId != null) }

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Linq links join

linq links Join Group von

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