D7: custom table in module

test.install

<?php

# test.install

/**
 * Implements hook_schema().
 *
 * @see https://api.drupal.org/api/drupal/modules%21system%21system.api.php/function/hook_schema/7.x
 * @link https://www.drupal.org/node/146862
 */
function test_schema() {
  $schema['test'] = array(
    'description' => '',
    'fields' => array(
      'id' => array(
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'title' => array(
        'type' => 'varchar',
	'length' => 256,
	'not null' => TRUE,
	'default' => '',
      ),
      'date' => array(
        'type' => 'int',
	'unsigned' => TRUE,
	'not null' => FALSE,
	'default' => 0,
      ),
    ),
    'primary key' => array('id'),
  );

  return $schema;
}

/**
 * Implements hook_uninstall().
 *
 * Delete config variable and module table.
 * @see https://api.drupal.org/api/drupal/modules%21system%21system.api.php/function/hook_uninstall/7.x
 */
function test_uninstall() {
  drupal_uninstall_schema('test');
  variable_del('test_var');
}