简单的PHP和MySQL问题 - COUNT

Question

我在搞乱一些统计工具。我的DB是这样的：

ip   | campaign_id | authorized | stamp 
----------------------------------------------------- 
182.74.723.1 | 1   | 0   | 12349210211 
82.14.127.1 | 3   | 1   | 29834043899 

我想有一个行说：

有 “XXX” 上的广告系列ID为 “X” 打（ “XXX” 被批准， “XXX” 为未授权）

到目前为止我的代码：

$query = "SELECT campaign_id, COUNT(ip) FROM stats GROUP BY campaign_id"; 
$result = mysql_query($query) or die(mysql_error()); 

// Print out result 
while($row = mysql_fetch_array($result)) { 
    echo "There are <b>". $row['COUNT(ip)'] ." hits</b> on campaign with <b>ID ". $row['campaign_id'] ."</b> (HERE COMES THE PART I'M LOOKING FOR)"; 
    echo "<br />"; 
} 

现在的问题：我无法找到一个解决方案来算“权威性”的不同值。 如果有人能帮我解决这个问题，我会非常高兴，提前致谢！

Answer 1

试试这个SQL查询：

SELECT campaign_id, 
    COUNT(ip) as tot, 
    sum(authorized=0) as a0, 
    sum(authorized=1) as a1, 
    .... 
    FROM stats GROUP BY campaign_id