On Tue, Apr 26, 2005 at 03:48:44PM -0500,
Scott Marlowe <smarlowe@g2switchworks.com> wrote
a message of 26 lines which said:
> Here's a quote from the SQL1992 spec that's VERY clear:
Yes, PostgreSQL is right and implement the standard. Now, what's the
rationale for the standard? I understand it for a single column but,
for several columns, it should be still possible to have different
tuples, such as (3, NULL) and (5, NULL) for instance.