Re: Visibility of table aliases in CTEs

Raymond O'Donnell wrote
> Hello all,
>
> In a WITH query, are table aliases within a CTE isolated from the rest
> of the query? For example, if I do this -
>
>   with my_cte as (
>     select * from my_table t
>   )
>   ....
>
> - can I re-use the alias "t" elsewhere in the same query?
>
> I had a dig through the appropriate section of the docs, but the answer
> wasn't obvious to me there.

This seems like one of those "just try it and see what happens" kind of
question.  But since I'm mobile and cannot run SQL I'll just say that such
an alias is indeed hidden.  No different than:

Select * from (tbla as alpha natrual join tblb as beta) as ab natural join
tbla as alpha

David J.






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