Did you know that there are PTFs that can give you some 7.1 performance benefits even if you're still on 6.1?
Written by Kent Milligan
One of the benefits of having a single integrated relational database in the IBM i operating system is that developers can freely mix and match different database interfaces. Database objects created with SQL can be accessed using the native record-level access interfaces. And database files created with Data Definition Specifications (DDS) can be accessed from SQL interfaces. There are a few exceptions, but this interface flexibility holds true most of the time.