Gurjeet Singh wrote:
On Sun, Sep 26, 2010 at 9:37 PM, Tom Lane <t...@sss.pgh.pa.us> wrote:The SQL standard explicitly disavows any particular output row order unless there is a top-level ORDER BY. (In fact, unless things have changed recently an ORDER BY in a sub-select isn't even legal per spec.)Not sure about the SQL spec allowing it, but an ORDER BY followed by a LIMIT does have valid use cases in sub-selects.
Absolutely it does, but that is just a row *filtering* operation. You still have to have a separate ORDER BY in the outermost query to get result rows output in a particular order. -- Darren Duncan
-- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
