Re: mistake, error, or something else ?

mbrugo_at_despammed.com wrote:

>Hi people.
>I've this query:
>
>select a,b,c from t1
>where c in (select distinct c from t2);
>
>
>this query run succesfully BUT:
>
>select distinct c from t2
>give me: ora-904 Invalid column name.
>
>WHY ????
>
>i've no synonym or other objects
>
>t1 has 3 columns, a,b,c
>t2 has 2 columns d,e
>
>Tia
>
>Mike
>
>

Which part of "t2 has 2 columns d,e" would lead you to believe that "select distinct c from t2" would be successful?

-- 
Daniel Morgan
http://www.outreach.washington.edu/ext/certificates/oad/oad_crs.asp
http://www.outreach.washington.edu/ext/certificates/aoa/aoa_crs.asp
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