Question

So at the root of my DB, I have a table “Customer.” Customer has foreign keys going to about 6-7 other tables such as Receipts, Addresses, Documents etc. If I were to delete a customer using SubmitChanges(), would that seek out all those records with the foreign key association and delete them too, or would I need to do like 6 queries?

Answer 1

This will only happen if you have set up your database tables to do this with cascading deletions (i.e. on delete cascade).

For more information please see Insert, Update, and Delete Operations (LINQ to SQL):

LINQ to SQL does not support or
recognize cascade-delete operations.
If you want to delete a row in a table
that has constraints against it, you
must either set the ON DELETE CASCADE
rule in the foreign-key constraint in
the database, or use your own code to
first delete the child objects that
prevent the parent object from being
deleted. Otherwise, an exception is
thrown.