Zduplikowane wyniki zapytania SQL Opcje

[Kedan]

Witam.

Mam kod:

[SQL] pobierz, plaintext 
SELECT `m`.`id` AS `id`, `m`.`name` AS `name`, `m`.`description` AS `description`, `m`.`edate` AS `edate`
FROM (`menu` AS `m`)
WHERE `m`.`name` = 'aaa' OR `m`.`name` = 'Menu'
[SQL] pobierz, plaintext 

Zapytanie poprawnie zwraca dwa wyniki:

[PHP] pobierz, plaintext 
Array
(
    [0] => stdClass Object
        (
            [id] => 1666514540
            [name] => Menu
            [description] => All menu here!!
            [edate] => 2010-04-25
        )
 
    [1] => stdClass Object
        (
            [id] => 510733235
            [name] => aaa
            [description] => aaa
            [edate] => 2010-04-29
        )
 
)
[PHP] pobierz, plaintext 

Natomiast gdy dodam kilka innych tabel do zapytania:

[SQL] pobierz, plaintext 
SELECT `m`.`id` AS `id`, `m`.`name` AS `name`, `m`.`description` AS `description`, `m`.`edate` AS `edate`
FROM (`menu` AS `m`, `relation_menu-group` AS `rmg`, `group` AS `rgs`)
WHERE `m`.`name` = 'aaa' OR `m`.`name` = 'Menu'
[SQL] pobierz, plaintext 

wyników jest już więcej (konkretnie 12).

Czy ktoś mógłby mi powiedzieć dlaczego?

Ten post edytował Kedan 4.06.2010, 00:18:31