global $wpdb;
$table_name = $wpdb->prefix . 'table_name';
$data_to_insert = array (
array ( 'name' => 'sample name', 'data' => 'something' ),
array ( 'name' => 'sample name two', 'data' => 'something else' )
);
foreach( $data_to_insert as $data ) {
$wpdb->update( $table_name, $data );
}