What wrong am I doing now?

mysql> SELECT DATE_FORMAT(dato, '%e-%c-%Y') FROM transportdokument WHERE dato >= '2013-07-20' AND dato <= '2013-07-24' GROUP BY dato DESC; +-------------------------------+ | DATE_FORMAT(dato, '%e-%c-%Y') | +-------------------------------+ | 24-7-2013 | | 23-7-2013 | +-------------------------------+ 2 rows in set (0.00 sec) mysql> // My PHP code looks like this. // ----------------------------------------- $sql = "SELECT DATE_FORMAT(dato, '%e-%c-%Y') FROM transportdokument WHERE dato >= '2013-07-20' AND dato <= '2013-07-24' GROUP BY dato DESC"; $resultat = mysql_query($sql, $tilkobling) or die(mysql_error()); while($rad = mysql_fetch_array($resultat)){ $dato = $rad['dato']; var_dump($dato); I gott NULL,NULL here and believe it is something with my PHP Source that is wrong when using DATE_FORMAT. As you see above it work in terminal. I hope this not is off-topic for the list. If so, I am sorry for it and hope you can give me advice about a good MySQL list for newbie's. Thanks again for your help! Karl