Mid From PDF LINQ LINQ

How to write a subquery?

Q: How to write a subquery?

Short answer: var topEarners = employees .Where(e => e.Salary > employees.Average(x => x.Salary)); Example code var topEarners = employees .Where(e => e.Salary > employees.Average(x => x.Salary)); Real-world example (ShopNest) ShopNest uses LINQ to query orders: filter by date, project to a summary DTO, and order by total—readable C# that becomes SQL under EF Core. Say this in the interview Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: var topEarners = employees .Where(e => e.Salary > employees.Average(x => x.Salary));

Example code

var topEarners = employees
.Where(e => e.Salary > employees.Average(x => x.Salary));

Real-world example (ShopNest)

ShopNest uses LINQ to query orders: filter by date, project to a summary DTO, and order by total—readable C# that becomes SQL under EF Core.

Say this in the interview

Define — one clear sentence (the short answer above).
Example — relate it to a project like ShopNest or your real work.
Trade-off — when you would not use it.

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