| Subject | Re: [firebird-support] what is wrong in this select? |
|---|---|
| Author | Fidel Viegas |
| Post date | 2008-02-27T23:34:56Z |
On Thu, Feb 28, 2008 at 12:27 AM, Fidel Viegas <fidel.viegas@...> wrote:
example given returns two different sets. But, generally speaking the
union operator should be used to draw information from two or more
tables with the same structure.
> Does itOoops, I got that wrong. In this case it does not compare, because the
> make much sense in math set theory doing a union with a single set?
> Well, the same applies here. At least that is what I think.
example given returns two different sets. But, generally speaking the
union operator should be used to draw information from two or more
tables with the same structure.