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mysql_connect
 mysql_connect($this->root,$this->user,$this->pass)
/*
mysql_connect ,µ¥¸ö·´ÎÊÓû§²»»áƵ·±µÄµ÷ÓÃÊý¾Ý¿â½Ì³Ì£¬Ã»±ØÒª±£³ÖÁ¬½Ó£¬¶øÇÒmysqlµÄÁ¬½ÓÊýÒ²ÊÇÓÐÏÞÖÆµÄ£¬ ʹÓà ¼°Ê±·ÃÎÊ±È½ÏÆµ·±£¬Ò²×îºÃʹÓÃmysql_connect£¬ÕâÑùʹÓõĹýµÄ×ÊÔ´¿ÉÒÔÁ¢¿ÌÊÍ·Å£¬·ñÔò£¬ÈÝÒ×Ôì³É×ÊÔ´ºÄ
*/
mysql_pconnect
/*
mysql_pconnect() º¯Êý´ò¿ªÒ»¸öµ½ MySQL ·þÎñÆ÷µÄ³Ö¾ÃÁ¬½Ó
*/
$con = mysql_pconnect("localhost","mysql_user","mysql_pwd");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
 
class testLinkMysql{ 
  public $conn;
  public $root='localhost';
  public $user='root';//'loupan';
  public $pass='root';//'loupandsffds';
  public $db='dbname';
  public $charset='gbk';
  public $links='c'; //±êÌâ
  
  function __construct() {
    if( !$this->conn )
   {
    $this->connect();
   }   
  }
  
    
  function __destruct() {
   if( $this->conn )
   {
          $this->close();
   }
     }
  
  
  function MysqlConnect()
  {
   try{
    if( 'p' == $this->links )
    {
     $this->conn = mysql_pconnect($this->root,$this->user,$this->pass) or die(mysql_error());       
    }
    else
    {
     $this->conn = mysql_connect($this->root,$this->user,$this->pass) or die( mysql_error());
    }
    mysql_select_db($t


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Doing INTERSECT and MINUS in MySQL
By Carsten | October 3, 2005
Doing an INTERSECT
An INTERSECT is simply an inner join where we compare the tuples of one table with those of the other, and select those that appear in both while weeding out duplicates. So
SELECT member_id, name from a
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<?php
    define('CLIENT_MULTI_RESULTS', 131072);
    $link = mysql_connect("127.0.0.1", "root", "",1,CLIENT_MULTI_RESULTS) or die("Could not connect: ".mysql_error());
    mysql_select_db("vs") or die("Could not select database");
?> ......
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