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Re: Extending my question. Was: The relational model and relational algebra - why did SQL become the industry standard?

From: Mikito Harakiri <mikharakiri_at_ywho.com>
Date: Tue, 11 Mar 2003 14:27:46 -0800
Message-ID: <hvtba.14$pX3.84@news.oracle.com>

"Jan Hidders" <jan.hidders_at_REMOVE.THIS.ua.ac.be> wrote in message news:3e6e57e3.0_at_news.ruca.ua.ac.be...
 What I meant was:
>
> >> SELECT f(x)
> >> FROM
> >> ( SELECT g(y)
> >> FROM y IN Y ) AS x
>
> and
>
> >> SELECT f(g(y))
> >> FROM Y AS y

In set model

SELECT f(x) as Fx, y
FROM
  ( SELECT g(y) as x, y
    FROM Y) reduces to

SELECT f(g(y)) as FGy, y
FROM Y Received on Tue Mar 11 2003 - 16:27:46 CST

Original text of this message

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