Обсуждение: UNION & LIMIT & ORDER BY

Hi

Why this query doesn't work ?

<<
SELECT  '1' AS id 
FROM  users
ORDER BY id
LIMIT 1
UNION
SELECT  '2' AS id 
FROM  users
>>

And this one work ?

<<
SELECT  '1' AS id 
FROM  users
UNION
SELECT  '2' AS id 
FROM  users
ORDER BY id
LIMIT 1
>>

-- 
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| Dans le cours d'un long gouvernement, on va au mal par une pente      |
| insensible, et ne remonte au bien que par un effort.                  |
|                       Montesquieu, "de l'esprit des lois" livre V/VII |
-------------------------------------------------------------------------
Emmanuel Engelhart alias Kelson | ICQ UIN : 53388731 | TEL 01.58.46.04.79

Hi,

Le Samedi 14 Juin 2003 17:01, Emmanuel Engelhart a écrit :
> [...]
Taken from the postgresql manual
(http://www.postgresql.org/docs/view.php?version=7.3&idoc=0&file=sql-select.html#SQL-UNION):
ORDER BY and LIMIT can be attached to a sub-expression if it is enclosed in
parentheses. Without parentheses, these clauses will be taken to apply to the
result of the UNION, not to its right-hand input expression.


Regards.


--
Guillaume <!-- http://absfr.tuxfamily.org/ -->.