On Tue, Sep 14, 2010 at 23:41, Stef Mientki <stef.mien...@gmail.com> wrote:

>
> until a few moments ago, this worked perfectly
>
> select Header from vraag
>  natural join vraaglist
>  where Nr = 0 and vraaglist.Name = 'eortc_br23'
>
> but now it returns an empty string (while the string shouldn't be empty).
>
> I test that by doing an explicit join
>
> select Header from vraag
>  join vraaglist on vraag.vlid = vraaglist.vlid
>  where Nr = 0 and vraaglist.Name = 'eortc_br23'
>

Are you sure that after altering your tables adding columns, natural join
still only joins on vlid?

-- 
Benoit Mortgat
20, avenue Marcel Paul
69200 VĂ©nissieux, France
+33 6 17 15 41 58
+33 4 27 11 61 23
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