Drupal7 table with sortable headers and pagination

Using below code you can able to display table with sortable headers & pagination.

// Define table headers

     
$header = array(
  array('data' => 'ID', 'field' => 'id', 'sort' => 'ASC'),
  array('data' => 'Name', 'field' => 'name'),
  array('data' => 'Date of birth', 'field' => 'dob'),
  array('data' => 'Email', 'field' => 'email'),
);

Here 'field' values are database field values. (Ex: 'field' => 'name')
If you want to assign sort option to table field like ID, use 'sort' attribute (ex: 'sort' => 'ASC').

// DB query

     
   $select = db_select('my_table', 't')
      // This line is to enable pagination
      ->extend('PagerDefault')
      // This is for table sort
      ->extend('TableSort');
      // Example for LIKE condition
      if (condition) {
        $select->condition('email', '%' . db_like($qry['email']) . '%', 'LIKE');
      }
   $select->fields('t', array('id', 'name', 'dob', 'email'))
      // Pagination limit
      ->limit(10)
      // Sort table header
      ->orderByHeader($header)
      // Example for group by
      ->groupBy('t.email')
      // example for order by
      ->orderBy('updated_time', 'DESC')
      // Example for COUNT().
      ->addExpression('COUNT(*)', 'total');
    $results = $select->execute();

// Collect table row values

     
foreach ($results as $row) {
   $rows[] = array(
        // ID with hyperlink.
        l($row->id, 'url', array('query' => array('qry' => $row->email), 'attributes' => array('target' => '_blank'))),
        $row->name,
        $row->dob,
        $row->email, // $row->total can also be used here.
      );
    }

// Putting all together to form a table.

     
    $output .= theme('table', array('header' => $header, 'rows' => $rows, "empty" => t("Table has no row!"), "sticky" => true));
    $output .= theme('pager');
    return $output;

Some useful references:
-- A Drupal 7 table with sortable headers and pager
-- DRUPAL 7 - CREATING DRUPAL STYLE TABLES WITH PAGING, SORTING AND FILTER.