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$sql = "SELECT * FROM belegung WHERE '$mydatevon' BETWEEN von AND bis OR '$mydatebis' BETWEEN von AND bis";
echo $sql;
$a = mysql_query($sql);
while ($b=mysql_fetch_array($a)) {
$test=$b['von'];
if ($test == "") {
echo ("geht");
} else {
echo ("geht nicht");
}
}
MySQL lieferte ein leeres Resultat zurück (d.h. null Zeilen). ( die Abfrage dauerte 0.0007 sek. )