[PHP] pobierz, plaintext 
$maxid= mysql_query("SELECT MAX(Id) FROM `_tabela_`");
 
$zapytanie = mysql_fetch_array($maxid, MYSQL_BOTH);
 
$max_id = $zapytanie[0];
 
echo $max_id;
[PHP] pobierz, plaintext 

[SQL] pobierz, plaintext 
SELECT * FROM tabela ORDER BY kolumna DESC LIMIT 1
[SQL] pobierz, plaintext