On May 12, 10:55 am, Urs Metzger <u...@[EMAIL PROTECTED]
> wrote:
> Sa**** schrieb:
>
> > Hi all,
>
> > I have a query as follows:
>
> > Select building, floor from T1
>
> > I would like to limit the output where the building, floor combination
> > is present only once in the output.
>
> > For example, if the output is
>
> > blgdA, 2
> > bldgA, 3
> > bldgA, 3
> > bldgB, 1
> > bldgB, 2
> > bldgB, 2
>
> > I would like to filter it so that the output is only
> > blgdA, 2
> > bldgB, 1
>
> > I'm not sure about how to do this.
>
> > Can someone help out?
> > Thanks,
> > Sa****
>
> Search the docs for GROUP BY and HAVING.
>
> htht,
> Urs Metzger
Thank you.
So I modified the query thus:
select bldg, count(Floor)
from T
group by bldg
having count(Floor) =3D1
However, when I try to include the floor number
select lbcode_key, count(floor ), floor
it fails: ORA-00979: not a GROUP BY expression =03
I want to be able to see the floor number.
Also there is another field "type" and I need to filter it by this
field as well, to include the regexp '%Switch'.
So my original query should have been:
Select building, floor from T1 where type like '%Switch'
However, the where clause is disallowed when using group by and the
having clause doesn't like this either.
How do I do this?
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