[EMAIL PROTECTED] writes:
> Hello there
>
> I have another SQL question. Please see the example :
>
> select *,
> (select a_typ from auftrag where a_nr=z_a_nr) as typ,
> (select a_t_definition_d from auftrags_typ where a_t_code=typ) as text
> from zylinder
select zylinder.*,
auftrag.a_typ
(select a_t_definition_d from auftrags_typ where a_t_code = auftrag.a_typ)
from zylinder, auftrag
where auftrag.a_nr = zylinder.z_a_nr;
or, using 7.1, maybe something like
select zylinder.*, auftrag.a_typ, auftrags_typ.a_t_definition
from (zylinder join auftrag on a_nr = z_a_nr)
left join auftrags_typ on a_t_code = a_typ
Other variations are possible, depending on the referential contraints you
have between the tables.
>
> I have three tables that I need data from. I'd like to use the <as typ> to
> temporary store the kind of auftrag and then use it to get the
> definition (clear text) from another table.
>
> The query returns that typ is not known .
--
Peter Eisentraut [EMAIL PROTECTED] http://yi.org/peter-e/
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