Could be similair to this:
while ($fetchArray = mysql_fetch_array($sqlStatement, MYSQL_ASSOC)){
$value[] = $fetchArray['columnNameWhatever'];
$date[] = $fetchArray['date'];
}
echo $date[0] . "<br />";
for($i=0, $j=-1; $i<count($columnArrau); $i++, $j++){
//if previous date is same as present then skip
if ($i && $date[$i] != $date[$j]) echo $date[$i] . "<br />"
//echo your other variables
echo $value[$i] . "<br />";
}