simple way to display the contents of a db table

I really appreciate your help on this. Below is the entire module.

//$Id: stock.module,v 1.17.2.2 2006/09/12 14:46:25 kbahey Exp $

// Copyright 2004-2005 Khalid Baheyeldin 2bits . com


function stock_help($section) {
  $output = '';

  switch ($section) {
    case 'admin/modules#description':
      $output = t('Stock quote page and block');
      break;
      
    case 'admin/help#stock':
    case 'admin/settings/stock':
      $output = t('This module provides stock quotes. It either displays a page format or a block format. Users can store their own stock symbols, and have a block that tells them how their portfolio is performing.');
      break;
  }
  
  return $output;
}
  
function stock_settings() {
  if (stock_check_dependancies()) {   
    $form['stock_description'] = array(
      '#type' => 'textarea',
      '#title' => t('Description'),
      '#default_value' =>  variable_get('stock_description', t('This is the stock quote page.')),
      '#cols' => 70,
      '#rows' => 7,
      '#description' => t('This text will be displayed at the top of the stock quote page'),
    );

    $form['stock_block_title'] = array(
      '#type' => 'textfield',
      '#title' => t('Stock block title text'),
      '#default_value' => variable_get('stock_block_title', t('stocks')),
      '#size' => 35,
      '#maxlength' => 255,
      '#description' => t('If configured as a block, this text shows as the block title.'),
    );

    $form['stock_overview_title'] = array(
      '#type' => 'textfield',
      '#title' => t('Navigation link text'),
      '#default_value' => variable_get('stock_overview_title', t('stock quote')),
      '#size' => 35,
      '#maxlength' => 255,
      '#description' => t('The text in the navigation link which points to the stock quote page.'),
    );
  }  
    
  return $form;
}  

function stock_perm() {
  return array ('use stock');
}

function stock_link($type, $node = 0, $main = 0) {
  $links = array();

  if ($type == 'page' && user_access('use stock')) {
    $links[] = l(t('stock'), 'stock');
  }

  return $links;
}

function stock_menu($may_cache) {
  $items = array();

  $title  = t(variable_get('stock_overview_title', 'stock quote'));
  $path   = 'stock';

  $items[] = array(
    'path'     => 'stock',
    'title'    => $title,
    'access'   => user_access('use stock'),    
    'callback' => 'stock_page',
    'weight'   => 0,    
  );

  return $items;
}

// Display the stock page
function stock_page() {
  if (stock_check_dependancies()) {
    $output = stock_contents('page');
  }

  return theme('stock_page', $output);
}

function stock_check_dependancies() {
  if (!module_exist('stockapi')) {
    drupal_set_message('stockapi module is not configured');
    return false;
  }
  return true;
}

function stock_block($op = 'list', $delta = 0) {
  $title = variable_get('stock_block_title', 'stocks');

  switch ($op) {
    case 'list':
      $block[0]['info'] = t($title);
      break;

    case 'view':
      switch ($delta) {
        case 0:
          $block['subject'] = t($title);
         if (user_access('use stock')) {
           $block['content'] = theme('stock_page', stock_contents('block'));
         }
         else {
           $block['content'] = t('You do not have permission to access this feature');
         }
          break;
        }
      break;
    }
    return $block;
}

// Display the form
function stock_form($symbols) {
  global $user;

  $form['symbol'] = array(
    '#type' => 'textfield',
    '#title' => t('Stock Symbol(s)'),
    '#default_value' => $symbols,
    '#size' => 40,
    '#maxlength' => 255,
    '#description' => t('Enter one or more space separated stock symbols to receive quotes on.'),
  );
     
  $form['button_quote'] = array(
    '#type' => 'button',
    '#input' => TRUE,
    '#name' => 'op',
    '#button_type' => 'submit',
    '#value' => t('Quote'),
    '#execute' => TRUE,
  );        
   
  // If user is logged in, then show him a Save button
  if ($user->uid) {  
    $form['button_save'] = array(
      '#type' => 'button',
      '#input' => TRUE,
      '#name' => 'op',
      '#button_type' => 'submit',
      '#value' => t('Save'),
      '#execute' => TRUE,
    );      
  }
  
  $form['#method'] = 'post';

  return drupal_get_form('stock_form', $form);
}

// Database Functions

// Get the saved symbols for the user
function stock_get_user_quotes() {
  global $user;
  return db_result(db_query("SELECT symbols FROM {stock} WHERE uid = %d", $user->uid));
}

// Save the symbols for the user
function stock_save_user_quotes($symbols) {
  global $user;

  // Delete the user's saved stocks
  db_query("DELETE FROM {stock} WHERE uid = %d", $user->uid);
  // Insert the new ones
  db_query("INSERT INTO {stock} VALUES (%d, '%s')", $user->uid, $symbols);
}

function stock_contents($format = 'block') {
  global $user;  

  switch ($format) {
    case 'block':
      if ( $user->uid ) {
        // get the stored tickers
        $symbols = stock_get_user_quotes();

        // get the quotes
        $output = stock_do_quote('short', $symbols);
      }
      else {
        $output = l('login', 'user/login') . ' or ' . l('register', 'user/register') . ' for portfolio';
      }
      break;

    case 'page':      
      $op = isset($_POST['op']) ? $_POST['op'] : '';
      $edit = isset($_POST['edit']) ? $_POST['edit'] : '';  
      $symbols = isset($edit['symbol']) ? strtoupper($edit['symbol']) : '';          
      $saved_symbols = '';
      $output = variable_get('stock_description', 'This is the default stock quote page.');            
      
      if ($op == t('Save') && $user->uid) {
        // If the user pressed the Save button, and is logged in, save their preferences        
        stock_save_user_quotes($symbols);        
        drupal_set_message(t('Your portfolio has been saved.'));
      }
      elseif ($op == t('Quote') && $user->uid) {
        // If the user pressed the Quote button, and is logged in, show his saved portfolio also, if it exists.
        $saved_symbols = stock_get_user_quotes();               
      }
      else{
        if (empty($symbols)) {
          // If nothing is entered, then get those saved, if any
          $symbols = stock_get_user_quotes();        
        }
      }
      
      if (!empty($symbols)) {      
      	$output .= stock_do_quote('long', $symbols);
      }

       if (!empty($symbols)) {      
      	$output .= stock_do_history('long', $symbols);
      }
  
      if(!empty($saved_symbols)){
        $output .= '<p>'. l(t('Your registered portfolio is'), 'stock') .': '. $saved_symbols .'</p>';    
      } 
      
      $output .= stock_form($symbols);          
      break;
  }     
  
  return $output;
}

function stock_do_quote($format = 'long', $symbol_list) {

  // Get the column headers
  $headers = stock_get_headers($format);

  // Convert the space separated list of symbols into an array
  $symbol_list = explode(' ', trim($symbol_list));

  foreach ($symbol_list as $symbol) {
    if (!empty($symbol)) {
      $stock = stockapi_load($symbol);
      if ($stock[8] != 'N/A') {
        // Date is 'N/A' means an invalid stock symbol  
        $rows[] = array('data'=> stock_process_data($stock, $headers));
      }else{
        drupal_set_message(t('Invalid symbol') .': '. $symbol);       
      }
    }
  }
  
  if (!empty($rows)) {
    return theme('table', $headers, $rows);
  }
}

function stock_do_history($format_history, $symbol) {

  // Get the column headers
  $headers = stock_get_history_headers($format_history);

    if (!empty($symbol)) {
         $result = db_query("SELECT 
       updated, current_price, change_amt, opening, high, low, volume, last_date, last_time
       FROM {stockapi_$symbol} ORDER BY updated DESC");
       while($row = db_fetch_array($result))
  {
      $rows[] = $row;
  }
 }
  if (!empty($rows)) {
    return theme('table', $headers, $rows);
  }
}

function theme_stock_page($output) {
  $css_path = drupal_get_path('module', 'stock') .'/stock.css";';
  drupal_set_html_head('<style type="text/css">@import "/'. $css_path .'</style>');   
  return $output;
}

function stock_get_headers($format = 'long') {
  // keys in these arrays must match the column names in the
  // stockapi table
  $stock_long_array = array (
    'symbol'        => "Symbol",
    'name'          => "Name",
    'current_price' => "Last",
    'change_amt'    => "Change",
    'opening'       => "Opening",
    'high'          => "High",
    'low'           => "Low",
    'volume'        => "Volume",
    'last_date'     => "Date",
    'last_time'     => "Time"
  );

  $stock_short_array = array (
    'symbol'        => "Symbol",
    'current_price' => "Last",
    'change_amt'    => "Change"
  );

  $headers = $stock_long_array;
  if ($format == 'short') {
    $headers = $stock_short_array;
  }
  
  return $headers;
}

function stock_get_history_headers($format_history) {
  $history_headers = array (
    'updated'        => "Updated",
    'current_price' => "Price",
    'change_amt'    => "Change",
    'opening'       => "Opening",
    'high'          => "High",
    'low'           => "Low",
    'volume'        => "Volume",
    'last_date'     => "Date",
    'last_time'     => "Time"
  );

  $headers = $history_headers;

  return $headers;
}

function stock_process_data($data, $headers) {
  $columns = array(); 
 
  foreach($headers as $key => $value) {
    $field = $data[$key];        
    
    // Special handling for some fields
    switch($key) {
      case 'symbol':
        $columns[] = _add_full_quote($field);
        break;
      case 'change_amt':
        $columns[] = _right_align(_up_down_tick(_decimals($field)));
        break;
      case 'current_price':
      case 'opening':
      case 'high':
      case 'low':
        $columns[] = _right_align(_decimals($field));
        break;
      case 'volume':
        $columns[] = _right_align($field);
        break;
      default:
        $columns[] = $field;
        break;
    }
  }

  return $columns;
}

function _add_full_quote($field) {
  // For symbol, we make it upper case
  $symbol = strtoupper($field);

  // Then we create a URL for the full quote page
  $url = drupal_get_path('module', 'stock') . '/history/' . $symbol;
  
  return l($symbol, $url, array('target' => '_blank'), NULL, NULL, TRUE);
}

function _right_align($field) {
  return '<div align="right">'.$field.'</div>';
}

function _decimals($field) {
  return number_format($field, 2);
}

function _up_down_tick($field) {
  // Add a style for the change field, so we can
  // add color, up tick/down tick, ...etc.
  $style='plus';
  if ($field < 0) {
    $style='minus';
  }  
  return '<div class="' . $style .'">'. $field .'</div>';
}

function stock_update_1() {
  return _system_update_utf8(array('stock'));
}

I started with the contributed stockapi.module and stock.module and have modified them. I have very little programming experience so I truely do appreciate you willingness to help. This is stock.module