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复杂检索数据并分页显示的处理方法

Jun 21, 2016 am 08:57 AM
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系统标题:复杂检索数据并分页显示的处理方法
系统功能:利用临时表检索数据库数据,然后分页显示的方法:
处理方法:采用临时表存放数据中间结果,根据中间结果显示数据
          数据的显示采用隔行的方式处理
处理优点:对于复杂的查询,特别是涉及到多表的数据查询,如果直接使用查询条件,系统的
          开销将很大,利用临时表把数据先保存,然后处理。这样对数据库的查询只要开销一次。
使用方法:只要把连接数据库的用户信息和数据表改变即可使用
        

  //连接数据库
  $dbh =  mysql_connect('localhost:3306','root','');
  mysql_select_db('test');  

  //把数据检索的结果保存到临时表中
   $ls_sql  = ' create temporary table temps ';
   $ls_sql .= ' select lk_title,lk_link from  lk_t_content ';
   $ls_sql .= " where lk_title like '%".$searchcontent."%' ";
   $res = mysql_query($ls_sql, $dbh);
  
  //得到检索数据的总数   
   $ls_sql = 'select count(*) as rcnt_con from temps ';
   $res = mysql_query($ls_sql, $dbh);
   $rcon = $row["rcnt_con"];   

   $pages=ceil($rcon / 20); //$pages变量现在总的页数   
   if (empty($offset))  {
       $offset=1;   
       $curline = 0;
    } else
      $curline = ($offset - 1) * 20;
   //打印表头
   print '';
   print '';
  print '';
  print "
  
';
   if ($offset 1) { //如果偏移量是0,不显示前一页的链接   
     $newoffset=$offset - 1;   
     print "前一页";   
   }  else {
     print "前一页";
     print "   ";
   }
  //显示所有的页数   
  for ($i=1; $i     $temps = "".$i."";
    print $temps;   
    print "   ";
  }   
  //检查是否是最后一页   
  if ($pages!=0 && $offset!=$pages)  {
     $newoffset=$offset+1;   
     print "下一页";   
  }  else print "下一页";
  print '
  
';
  print "当前页:".$offset." 共".$pages."页";
  print '
";

  //显示查询信息
  print '';
  print ' ';
  print '';
  print '';

  $query = "select lk_title,lk_link from temps order by lk_title desc LIMIT ".$curline.",20";
  $res = mysql_query($query, $dbh);  

  $li_num = 0;
  while ($row = mysql_fetch_array($res)) {  
     //采用隔行显示的方法显示信息内容
     if ($li_number == 0) {
        
    $li_number = 1;
     } else {
        
    $li_number = 0;
     }
     $tempstr = "".$row['lk_title']."";
     print '';
     print '';
  }
  print "
  
查询结果信息
 '.$tempstr.'
";
?>
----------------------------
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