LINQ .Select() is quite slow

How to select Distinct / Group By child property in both LINQ method and syntax?

There is no need to connect the parent since you can simply use...Child.ParentId...In any case, you could:...var result = db.Set<Child>().Where(c => c.Parent.ParentId = 1).GroupBy(c => c.Grade); ...the join; or not;...var result = db.Set<Child>().Where(c => c.ParentId = 1).GroupBy(c => c.Grade); ...And distinctive is just:...var result = db.Set<Chi...

Entity Framework Core - LINQ select over navigational properties creates invalid query

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Linq query using ID returns result to slow (EF Core)

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Enumerable.Any() is very Slow on Large Linq Data Set

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Value cannot be null Parameter name: source at System.Linq.Enumerable.Select[TSource,TResult]

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LINQ Include slowing down performance when searching

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LINQ: Select the Min and Max values from a collection on an entity after grouping

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How select hierarchy from child to parent using linq for entities or EF Core 2?

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Why Linq "where" expression after Select gets evaluated locally when created through a generic method?

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LINQ - Entity Framework Core - SELECT most recent record, only if it matches another condition

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