AsSplitQuery

EF Core 5 introduced support for split queries which will perform separate queries rather than complex joins when returning data from multiple tables. A single query result with data from many tables may result in a “cartesian explosion” of duplicate data across many columns and rows. EF allows you to specify that a given LINQ query should be split into multiple SQL queries. Instead of JOINs, split queries generate an additional SQL query for each included collection navigation.

Compatible with the following providers:

• EF Core
• EF6 - not supported

Below is a specification that uses AsSplitQuery in order to generate several separate queries rather than a large join across the Store, Product, and Image tables:

public class StoreSpec : Specification<Store>
{
    public StoreSpec(string city)
    {
        Query.Where(x => x.City == city)
             .Include(x => x.Products)
                .ThenInclude(x => x.Images)
             .AsSplitQuery();
    }
}