What are the differences between LINQ queries and SQL?

What are the differences between LINQ queries and SQL?

LINQ (Language Integrated Query) is a .NET framework feature that allows querying collections in a more readable way, while SQL (Structured Query Language) is used for managing and querying relational databases. LINQ queries can be written in C# or VB.NET, whereas SQL is a standalone language.

Can you give me an example of a LINQ query?

Sure! Here's a simple example of a LINQ query in C# that retrieves all users from a list whose age is over 18:

var adults = from user in users
             where user.Age > 18
             select user;

How does LINQ handle data compared to SQL?

LINQ operates on in-memory collections, allowing for type safety and compile-time checking, while SQL interacts directly with databases, which can lead to runtime errors if the query is incorrect. LINQ also supports method chaining, making it more flexible for complex queries.

Which one is better for performance?

It depends on the context. SQL is generally more efficient for large datasets since it's optimized for database operations, while LINQ is better for smaller, in-memory collections where developer productivity and code readability are prioritized.