select t.row1, p1.name as key1, p2.name as key2
from table1 t
left join table2 p1 on (t.key1=p1.id)
left join table2 p2 on (t.key2=p2.id)



-- phpMyAdmin SQL Dump
-- version 2.6.1
-- http://www.phpmyadmin.net
-- 
-- Host: localhost
-- Generation Time: Aug 04, 2007 at 12:19 PM
-- Server version: 4.1.9
-- PHP Version: 4.3.10
-- 
-- Database: `cert`
-- 

-- --------------------------------------------------------

-- 
-- Table structure for table `table1`
-- 

CREATE TABLE `table1` (
  `row1` int(5) NOT NULL auto_increment,
  `key1` int(5) NOT NULL default '0',
  `key2` int(5) NOT NULL default '0',
  PRIMARY KEY  (`row1`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ;

-- 
-- Dumping data for table `table1`
-- 

INSERT INTO `table1` VALUES (1, 1, 2);
INSERT INTO `table1` VALUES (2, 3, 4);