ZF框架Db类select查询器简单用法&分页

 '127.0.0.1' ,
				'username' => 'root' , 
				'password' => '111' , 
				'dbname' => 'test',
				'profiler' => "true"
				);
//告诉Zend_Db类所操作的数据库和数据库配置信息
$Db = Zend_Db::factory('PDO_Mysql' , $Config); 
//执行编码语句 
$Db -> query("set names utf8");
//-----------------------------------------------
//使用fetchOne()方法得出表的总条数
$Total = $Db -> fetchOne("select count(*) from gongsi");
//定义每页显示条数
$B = 50;
//得出总页数
$A = ceil($Total/$B);

//-----接下来为一系列的查询表、取结果集、分页等操作
$Select = $Db ->select();
$Select -> from('sanguo',array('s_sheng as 省份','sum(s_gongzi) as 总工资','min(s_gongzi) as 
最低工资','max(s_gongzi) as 最高工资','avg(s_gongzi) as 平均工资'));
// $Select -> Where('s_gongzi>=3000');
// $Select -> Where("s_sheng='河北'");
// $Select -> order('s_sheng asc');
// $Select -> order('s_gongzi desc');
$Select -> group('s_sheng');  //分组
//$Select -> having('最高工资>10000');  //附加条件
$Select -> order('最高工资 desc');  //排序
$Select -> limit(0,0); //截取
$Select -> limitPage($page, $B); //分页
/*SQL语句相当于：
select s_sheng as 省份,sum(s_gongzi) as 最高工资 from sanguo group by s_sheng having 最高工资>10000 order by 
最高工资 desc limit 0,10;
*/
$Result = $Db->fetchAll($Select);

echo "";
echo "省份总工资最低工资最高工资平均工资";
foreach ($Result as $key => $value) 
{
	echo "";
	foreach ($value as $key2 => $value2) 
	{
		echo "" . $value2 . "";
	}
	echo "";
}
echo "";
echo "";
echo "首页  ";
if ($page>1) 
{
	echo "上页  ";
}
for ($i=1; $i <=15 ; $i++) 
{ 
	echo "".$i."  ";
}
if ($page