Hi with the follow code I request what dates are all in my database without duplicates. Then I save it to an array. In the array I also need an other value.
The value I need is how much users are in one day in the database without duplicates. For Example the array must later lookslike 23.07.2013 - 10, 24.07.2013 - 50 (users). I search for several hours but I don't find a good mysql query.
$query = "SELECT id, user, timestamp FROM stat WHERE timestamp BETWEEN '$datum1' AND '$datum2' GROUP BY timestamp";
$result = mysql_query($query,$db);
while($row = mysql_fetch_assoc($result))
{
mysql_num_rows($result);
$dataset1[] = array(strtotime($row['timestamp']),$number_of_users_on_this_day);
}
Try:
$query = "SELECT id, user, COUNT(*) as count FROM stat WHERE timestamp BETWEEN '$datum1' AND '$datum2' GROUP BY timestamp";
This will return the number of entries in the value 'count'
if you want distinct data, in place of * use
COUNT(DISTINCT id)
with whatever field you want to be unique in place of 'id'
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