如何從mysql查找時間總和

你好，我打算從我的sql打印時間總和，但我無法幫助我。如何從mysql查找時間總和

$SQL = "SELECT duration FROM core_network "; 
$result = mysql_query($SQL); 


$c_count='0'; 
$n="0"; 
$duration=array(); 
while ($db_field = mysql_fetch_array($result)) { 
$duration[$n]= $db_field['duration']; 
echo $duration[$n]; 
$n++; 
$c_count++; 
} 





the result is 18:00:0000:39:0008:00:00 


than i found the code from internet 


function sum_the_time($Duration) { 
$times = array('18:00:00','00:39:00','08:00:00'); 
$seconds = 0; 
foreach ($times as $time) 
{ 
    list($hour,$minute,$second) = explode(':', $time); 
    $seconds += $hour*3600; 
    $seconds += $minute*60; 
    $seconds += $second; 
} 
$hours = floor($seconds/3600); 
$seconds -= $hours*3600; 
$minutes = floor($seconds/60); 
$seconds -= $minutes*60; 
    // return "{$hours}:{$minutes}:{$seconds}"; 
return sprintf('%02d:%02d:%02d', $hours, $minutes, $seconds); 
    } 
echo sum_the_time($duration);

如何輸入$持續時間[$ n]至$次=陣列（'18：00：00' ， '零時39分00秒'， '8點○○分00秒'）;次

來源

2012-10-22 Batnasan ganpurev

據我瞭解，你想放的foreach（$持續時間$時間）來代替的foreach（$倍$時間）？ –

SELECT SUM（duration）AS totalDuration FROM core_network GROUP BY列 echo $ row ['totalDuration']; –

請不要使用'mysql_ *'函數來編寫新代碼。他們不再維護，社區已經開始[棄用程序]（http://goo.gl/KJveJ）。查看[*紅色框*]（http://goo.gl/GPmFd）？相反，您應該瞭解[準備好的語句]（http://goo.gl/vn8zQ）並使用[PDO]（http://php.net/pdo）或[MySQLi]（http://php.net/ mysqli的）。如果你不能決定哪些，[這篇文章]（http://goo.gl/3gqF9）會幫助你。如果你選擇PDO，[這裏是很好的教程]（http://goo.gl/vFWnC）。 –

insteed只是通過$持續時間參數功能：

function sum_the_time($times) { 
$seconds = 0; 
foreach ($times as $time) 
{ 
    list($hour,$minute,$second) = explode(':', $time); 
    $seconds += $hour*3600; 
    $seconds += $minute*60; 
    $seconds += $second; 
} 
$hours = floor($seconds/3600); 
$seconds -= $hours*3600; 
$minutes = floor($seconds/60); 
$seconds -= $minutes*60; 
    // return "{$hours}:{$minutes}:{$seconds}"; 
return sprintf('%02d:%02d:%02d', $hours, $minutes, $seconds); 
    } 
echo sum_the_time($duration);

來源

2012-10-22 03:42:50

如何從mysql查找時間總和

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