PgSQL-dotazy

[Zdenek Prchal]

> 
> On Tue, Dec 03, 2002 at 09:17:13AM +0100, Frantisek Darena wrote:
> > select sl1 sloupec from tab1
> > union all
> > select sl2 sloupec from tab2
> > order by sloupec (nebo order by 1)
> 
>  Ooops ...todle je pochopitelne lepsi sesortovani nez jsem pred 
>  chvilkou poslal s tim subselectem, jo v jednoduchosti je sila :-) 
> 

No lepsi, je to jednodussi zapis, to ano, ale IMHO by to v obou pripadech
melo vest na stejny execution plan, ne? Co na to rika EXPLAIN?

Z.