我尝试获取内容 ID,这是查询...
$getIDs = mysql_query("SELECT content_id FROM playlist_content WHERE playlist_id=".$rrow['playlist_id']."") or die(mysql_error());
while($row = mysql_fetch_array($getIDs)) {
$array[] = $row;
}
这是结果
Array
(
[0] => Array
(
[0] => 33
[content_id] => 33
)
[1] => Array
(
[0] => 13
[content_id] => 13
)
[2] => Array
(
[0] => 8
[content_id] => 8
)
)
现在必须从具有此 ID 的第二个表中获取值 注意:ID = content_id
$result = mysql_query("SELECT SUM( length ) as total FROM content WHERE ID ...
并且所有行的回显总和['length'这个ID在哪里需要支持结果,就像102或256等等......
或者有什么更好的方法来得到 sum ?