EF Where(x => x.ColumnVal == 1) vs FirstOrDefault(x => x.Column == 1)

Question

I had a LINQ query that loads a hierarchy of objects like the following.

Query #1

var result = db.Orders
               .Include(\"C         


        

Answer 1

I found the culprit. It's the SQL query generated by Entity Framework.
I have a complicated Schema with a lot of many-to-many relationships.

Entity Framework was generating a 32,000 line long SQL string :'(
Now, I am changing my code to load the hierarchy manually for some part.

Please let me know if anyone knows some good articles to read about Eager Loading and Many-to-Many relationships.