How can I perform complex queries using LINQ in SQL?

How can I perform complex queries using LINQ in SQL?

You can use LINQ to create complex queries by combining methods like .Where(), .Select(), and .GroupBy(). Would you like an example?

Yes, please provide an example of a complex query.

Sure! For instance, if you have a list of orders, you can group them by customer and calculate the total amount spent by each customer using LINQ.

That sounds great! Can you show me the code for that?

Absolutely! Here's a sample code snippet:

var query = from order in orders
            group order by order.CustomerId into customerGroup
            select new {
                CustomerId = customerGroup.Key,
                TotalSpent = customerGroup.Sum(o => o.Amount)
            };