Getting a dynamic Sample - response (7) by dnoeth

The same value will always result in the same HashRow, that's why is said "xxx must be a column which is (close to) unique".
If it's the logical Primary Key of this table you're not going to load the same row a second time.

But just go for the Derived Table with RANDOM, it's easier to write and there's a big advantage:
The size of the RANDOM is always 4 bytes while the PK might be much more bytes, thus requiring more spool space.

Dieter