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<H3>ActiveX Data Objects (ADO) Record Counting</H3>
Counting the number of records in a Recordset is something many find troublesome at first. The solution to why it sometimes return -1 instead of an accurate count is very simple. In order to avoid -1, you must use a cursor that can move all the way to the end of the Recordset and then back. Unless specified, the cursor will default to a cursor that moves only forward in the Recordset, thus can not determine the count. In this example, we use a Keyset cursor, which is a lightweight cursor that can move both forward and backward. When the database connection is open, the Recordset will contain the number of available records matching the query in its RecordCount-property.
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<%
my $adOpenKeySet_CursorType = 1;
$rst = $Server->CreateObject('ADODB.Recordset');
$rst->Open('SELECT * FROM Orders', 'ADOSAMPLES', $adOpenKeySet_CursorType);
$Response->Write("There are ".$rst->{RecordCount}." records in the Recordset");
$rst->Close(); # Close the recordset
undef($rst); # Destroy the object
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