Re: Re: [HACKERS] Re: [SQL] MAX() of 0 records.

On Fri, 07 Jul 2000, Tom Lane wrote:
> Chris Bitmead <chris@bitmead.com> writes:
> 	UPDATE foo
> 	SET bar = (SELECT min(f1) FROM othertab
> 	           WHERE othertab.keycol = foo.keycol)
> 	WHERE condition-determining-which-foo-rows-to-update
> if you wanted to use an aggregate.  This is pretty ugly, especially so

If you use min(x) or max(x) frequently, isn't it best to make a trigger that
intercepts x on insert and update, then check it and store it somewhere rather
than scanning for it everytime?  (not that this fixes any db problem thats being
discussed here)

 -- 
			Robert