LINQ in EF Core

LINQ (Language Integrated Query)

LINQ ensures type safety by allowing the use of C# syntax for querying databases, with compile-time checking and IntelliSense support. In EF Core, LINQ queries are translated into SQL automatically, eliminating the need to write raw SQL manually. While LINQ simplifies querying and improves maintainability, it’s important to monitor performance, especially for complex queries.

  • No-Tracking: Use .AsNoTracking() for read-only queries to improve performance.
  • Deferred Execution: Queries are executed when they are iterated over (e.g., with .ToList()).

 

Common LINQ Operations:

  • Filtering: Where for conditional queries.
  • Projection: Select to fetch specific columns.
  • Sorting: OrderBy to order results.
  • Joins: Join to combine data from multiple tables.
  • Aggregation: GroupBy, Count, etc., for grouping and summarizing data.

 

Benefits:

  • Type safety and IntelliSense support.
  • Abstraction from raw SQL reduces errors and vulnerability to SQL injection.
  • Improved readability and maintainability, especially in large codebases.

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