Set Filter To can narrow the scope on Working area.
Even use the Delete command, only the selected scope got effect.

i.e.

Set Exact Off
Set Ansi On
Use ItemTable
* Filter ItemKey Start with 3 Only 
Set Filter To ItemKey = [3]
Delete For .T.
Set Filter To
Browse && find that only starting with 3 itemKey Record has marked!

So, which is better? Select-Into-Cursor or Even a true read/write Cursor cannot update the BaseTable directly. Need further control which taking Confirm Action. Such as 'Insert Into' when confirm add.

So, I would want to Discuss the Pros and Cons on using
SET FILTER TO or a R/W Cursor ?

Especially for the situations/cases to use the method can get better maintainbility! ^_^;