anchor.diff:  let ctx = sql.GetDataContext()
   (**
   When you press . on ``ctx``, intellisense will display a list of properties representing the available tables and views within the database.  
  +
   In the simplest case, you can treat these properties as sequences that can be enumerated.
   *)
   
  
positive.code: 
  let orders = firstCustomer.FK_Orders_0_0 |> Seq.toArray
  (**
  ``orders`` now contains all the orders belonging to firstCustomer. You will see the orders type is of ``[Main].[Orders]Entity`` indicating the resulting entities are from the ``[main].[Orders]`` table in the database.
  If you hover over ``FK_Orders_0_0`` intellisense will display information about the constraint in question including the names of the tables involved and the key names.
  Behind the scenes the SQL provider has automatically constructed and executed a relevant query using the entity's primary key.
  
  
negative.code: 
  let multipleFilteredQuery =
      query { for customer in ctx.``[main].[Customers]`` do
              where ((customer.ContactName = "John Smith" && customer.Country = "England") 
              		|| customer.ContactName = "Joe Bloggs")
              select customer } |> Seq.toArray
  
  (**
  