On Tue, Nov 30, 2010 at 05:09, Jaime Casanova <jaime@2ndquadrant.com> wrote:
> at least IMHO the only sensible way that LIMIT is usefull is with
> an ORDER BY clause with make the results very well defined...
DELETE with LIMIT is also useful for deleting things in batches, so
you can do large deletes on a live system without starving other users
from I/O. In this case deletion order doesn't matter (it's more
efficient to delete rows in physical table order) -- ORDER BY isn't
necessary.
Regards,
Marti