Ok. I have mistakes, here, I know..
$statAll="SELECT * FROM entries";
$statAllQ=mysql_query($statAll,$conn);
echo "<table border='0'>
<tr>
<th style=\"padding: 5px;\">Year</th>
<th style=\"padding: 5px;\">Month</th>
<th style=\"padding: 5px;\">Count</th>
</tr>";
while($row = mysql_fetch_array($statAllQ)):
echo "<tr style=\"text-align: center;\">";
$yearx = date('Y', strtotime($row['timestamp']));
echo "<td>" .$yearx. "</td>";
echo "<td>";
$monthx = array(
1=>"január",
"február",
"marec",
"apríl",
"maj",
"jun",
"jul",
"august",
"september",
"oktober",
"november",
"december");
$numb_month = date('n', strtotime($row['timestamp']));
$month_abbr = $monthx[$numb_month];
echo $month_abbr;
echo "</td>";
$stat=mysql_query("SELECT YEAR('timestamp'), MONTH('timestamp'), COUNT(*) FROM entries GROUP BY YEAR('timestamp'), MONTH('timestamp')")or die(mysql_error());
$rowsOut=mysql_num_rows($stat);
echo "<td>$rowsOut</td>";
echo "</tr>";
endwhile;
echo "</table>";
