Add QuerySplittingBehavior

[sjh37]

Microsoft documentation

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    optionsBuilder
        .UseSqlServer(
            @"Server=(localdb)\mssqllocaldb;Database=EFQuerying;Trusted_Connection=True",
            o => o.UseQuerySplittingBehavior(QuerySplittingBehavior.SplitQuery));
}

When split queries are configured as the default, it's still possible to configure specific queries to execute as single queries:

using (var context = new SplitQueriesBloggingContext())
{
    var blogs = context.Blogs
        .Include(blog => blog.Posts)
        .AsSingleQuery()
        .ToList();
}