| From: | Herouth Maoz <herouth(at)oumail(dot)openu(dot)ac(dot)il> |
|---|---|
| To: | "Michael Yeung" <michaely(at)alphanet(dot)net(dot)au>, "pgsql SQL" <pgsql-sql(at)postgreSQL(dot)org> |
| Subject: | Re: [SQL] Order by |
| Date: | 1999-06-02 09:34:42 |
| Message-ID: | l03130302b37aaa3d3da3@[147.233.159.109] |
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| Lists: | pgsql-sql |
At 03:48 +0300 on 02/06/1999, Michael Yeung wrote:
> Hi all,
>
> Is anyone know that if we allow order-by clause in the view structure.
> If not, how can we take the ordering of the UNION ALL in 2 different bags ?
Correct me if I'm wrong, but ORDER BY shoud not be part of a view, in the
same way it is not a part of a table. A table is defined as an unordered
collection of tuples. In any given query, you can define the order of the
tuples returned. But the table itself is not ordered.
A view should look to the user just like a table. The order of the tuples
is part of the query, not part of the table, and not part of the view.
Herouth
--
Herouth Maoz, Internet developer.
Open University of Israel - Telem project
http://telem.openu.ac.il/~herutma
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