drupal 7, views data alter

scratch.txt

CREATE TABLE example_table (
  nid INT(11) NOT NULL,
  plain_text_field VARCHAR(32,
  numeric_field INT(11),
  boolean_field INT(1),
  timestamp_field INT(8),
  PRIMARY KEY(nid)
);

function mymodule_views_data() {
  $data['example_table']['table']['group'] = t('Example table');

  $data['example_table']['table']['base'] = array(
    'field' => 'nid',
    'title' => t('Example table'),
    'help' => t('Example table contains example content and can be related to nodes.'),
    'weight' => -10,
  );

  $data['example_table']['table']['join'] = array(
    'node' => array(
      'left_field' => 'nid',
      'field' => 'nid',
    ),
  );

  $data['example_table']['nid'] = array(
    'title' => t('Example content'),
    'help' => t('Some example content that references a node.'),
    'relationship' => array(
      'base' => 'node',
      'base field' => 'nid', // The name of the field on the joined table.
      // 'field' => 'nid' -- see hook_views_data_alter(); not needed here.
      'handler' => 'views_handler_relationship',
      'label' => t('Example node'),
    ),
  );

  $data['example_table']['plain_text_field'] = array(
    'title' => t('Plain text field'),
    'help' => t('Just a plain text field.'),
    'field' => array(
      'handler' => 'views_handler_field',
      'click sortable' => TRUE,
    ),
    'sort' => array(
      'handler' => 'views_handler_sort',
    ),
    'filter' => array(
      'handler' => 'views_handler_filter_string',
    ),
    'argument' => array(
      'handler' => 'views_handler_argument_string',
    ),
  );

  $data['example_table']['numeric_field'] = array(
    'title' => t('Numeric field'),
    'help' => t('Just a numeric field.'),
    'field' => array(
      'handler' => 'views_handler_field_numeric',
      'click sortable' => TRUE,
    ),
    'filter' => array(
      'handler' => 'views_handler_filter_numeric',
    ),
    'sort' => array(
      'handler' => 'views_handler_sort',
    ),
  );

  $data['example_table']['boolean_field'] = array(
    'title' => t('Boolean field'),
    'help' => t('Just an on/off field.'),
    'field' => array(
      'handler' => 'views_handler_field_boolean',
      'click sortable' => TRUE,
    ),
    'filter' => array(
      'handler' => 'views_handler_filter_boolean_operator',
      'label' => t('Published'),
      'type' => 'yes-no',
      'use equal' => TRUE,
    ),
    'sort' => array(
      'handler' => 'views_handler_sort',
    ),
  );

  $data['example_table']['timestamp_field'] = array(
    'title' => t('Timestamp field'),
    'help' => t('Just a timestamp field.'),
    'field' => array(
      'handler' => 'views_handler_field_date',
      'click sortable' => TRUE,
    ),
    'sort' => array(
      'handler' => 'views_handler_sort_date',
    ),
    'filter' => array(
      'handler' => 'views_handler_filter_date',
    ),
  );

  return $data;
}