On 13 Sep 2006 at 13:29, lobolo2000 wrote:

>The SQL below guarantees uniqueness of F1 union F2 within a single
>transaction. Can this concept be extended to cover 2 simultaneous
>transactions that add records to these tables then commit one after
>the other?

These fields' values will be unique if they are gotten from one
generator.

--
SY, Dimitry Sibiryakov.