Posted by JJ297 on 10/24/07 17:24

On Oct 24, 1:05 pm, "Roy Harvey (SQL Server MVP)"
<roy_har...@snet.net> wrote:
> On Wed, 24 Oct 2007 09:08:25 -0700, JJ297 <nc...@yahoo.com> wrote:
> >The key for the titleclassification table
> >is titleclassID
>
> Then either I do not understand the purpose of the table (likely, as I
> can only guess) or the table had an ID column stuck on as a key out of
> blind reflex. My assumption was that it was a "junction" table used
> to make a many-to-many relationship between title and classification.
> Such a table would properly have a key consisting of the key column(s)
> of the Titles table plus the key column(s) of the Classifications
> table.
>
> >When I entered what you wrote in query analyzer I got...
>
> >The column prefix 'classifications' does not match with a table name
> >or alias name used in the query.
>
> I missed changing one reference to use the alias.
>
> SELECT A.titleid,
> A.title,
> A.[description],
> B.quantityowned,
> D.[description]
> FROM Titles as A
> JOIN resources as B
> ON A.titleid = B.titleid
> JOIN titleclassification as C
> ON A.titleid = C.titleid
> JOIN classifications as D
> ON D.classificationid = C.classificationid
>
> Roy Harvey
> Beacon Falls, CT

Thanks Roy I am now getting the results I need. I see what I did
wrong.

Thanks so much for your help!

[Back to original message]