drupal/modules/upload/upload.install

<?php
// $Id$

/**
 * Implementation of hook_install().
 */
function upload_install() {
  // Create tables.
  drupal_install_schema('upload');
}

/**
 * Implementation of hook_uninstall().
 */
function upload_uninstall() {
  // Remove tables.
  drupal_uninstall_schema('upload');
}

/**
 * Implementation of hook_schema().
 */
function upload_schema() {
  $schema['upload'] = array(
    'fields' => array(
      'fid'         => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
      'nid'         => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
      'vid'         => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
      'description' => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''),
      'list'        => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0, 'size' => 'tiny')
    ),
    'primary key' => array('fid', 'vid'),
    'indexes' => array('vid' => array('vid'), 'nid' => array('nid')),
  );

  return $schema;
}