在MDB ACCESS数据库上重置PHP中的AUTO_INCREMENT

Question

For a demo purpose, I need after empty all tables in my ACCESS format "database.mdb" using PHP and then reset all IDs AUTO_INCREMENT to 1, but i've problems with resetting PRIMARY KEYS.

It's important i've do all with PHP script.

I tried with:

/* ConnString verso il database da compattare */
$oldConn="Provider=Microsoft.Jet.OLEDB.4.0;";
$oldConn.="Data Source=".$path.$olddb.";";
$oldConn.="Jet OLEDB:Database Password=$oldpass ;";

/* ConnString verso il nuovo database (compattato) */
$newConn="Provider=Microsoft.Jet.OLEDB.4.0;";
$newConn.="Data Source=".$path.$newdb.";";
$newConn.="Jet OLEDB:Database Password=$newpass ;";    
$je=new COM("JRO.JetEngine") or die("Compact failed");
    $je->CompactDatabase($oldConn,$newConn) ;
    $je->Release() ;
    $je= null ;

but i get an error with CompactDatabase().

I also tried with PDO connection and:

$pdo->exec("ALTER TABLE tbl AUTO_INCREMENT = 1");

or

$s = $pdo->prepare("ALTER TABLE tbl MODIFY COLUMN ID INT(10) UNSIGNED AUTO_INCREMENT");

but i get: Syntax error or access violation

Is there any other way to do this?

Answer 1

try this:

ALTER TABLE MyTable ALTER COLUMN MyColumn COUNTER(1,1)