<?php
$sorgu = mysql_query("Select SUM(tekil) as a from sayac");
$TekilSay=mysql_fetch_array($sorgu);
?>

...


<?php echo $TekilSay['a']; ?>

Hata;
Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in /var/www/Bloklar/Istatistik/index.php on line 176