Код: Выделить всё
(SELECT DISTINCT `idAdres` FROM `table` WHERE `idSender` = 42)
UNION DISTINCT
(SELECT DISTINCT `idSender` FROM `table` WHERE `idAdres` = 42)
Код: Выделить всё
(SELECT DISTINCT `idAdres` FROM `table` WHERE `idSender` = 42)
UNION DISTINCT
(SELECT DISTINCT `idSender` FROM `table` WHERE `idAdres` = 42)