在sql server中上传csv文件，不清空数据库中的表

我想在sql server数据库中上传csv文件。我想在插入....之前一个接一个地上传数据，而不清空表我如何修改代码来实现…

谢谢。

$deleterecords = "TRUNCATE TABLE csvTable"; //empty the table of its current records
$params = array();
$options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
$stmt = sqlsrv_query($conn, $deleterecords, $params, $options ); 
//$stmt=odbc_exec($conn,$deleterecords);


//Upload File
if (isset($_POST['submit'])) {
    if (is_uploaded_file($_FILES['filename']['tmp_name'])) {
        echo "<h1>" . "File ". $_FILES['filename']['name'] ." uploaded successfully." . "</h1>";
        echo "<h2>Displaying contents:</h2>";
        readfile($_FILES['filename']['tmp_name']);
    }
    //Import uploaded file to Database
    $handle = fopen($_FILES['filename']['tmp_name'], "r");
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $import="INSERT into csvTable(Name,city) values('$data[0]','$data[1]')";
        $params = array();
        $options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
        $stmt = sqlsrv_query($conn, $import, $params, $options ); 
        //$stmt=odbc_exec($conn,$import);
    }
    fclose($handle);
    print "Import done";