Question

我要計數的行總數，樣品：

row1 = 1 
row2 = 1 
row3 = -1 
row4 = 1 
row5 = -1 

總共= 1，becouse 1 + 1 +（ - 1）1 +（ - 1）= 1

我想從數據庫指望它

我的代碼是：

<? $result_count_like = mysql_query("SELECT * FROM like_mood WHERE img_id='$imageid'"); 
while($row_like_co = mysql_fetch_array($result_count_like)) 
    { 
    $total_num=$row_like_co['mood_num']; // THIS IS ROWS NAME 
    } 
?> 

謝謝:)

Answer 1

<? 
$toCount = array(); 
$result_count_like = mysql_query("SELECT * FROM like_mood WHERE img_id='$imageid'"); 
while($row_like_co = mysql_fetch_array($result_count_like)) 
{ 
    $toCount[]=$row_like_co['mood_num']; // THIS IS ROWS NAME 
} 

echo array_sum($toCount); 

?> 

Answer 2

嘗試...

SELECT SUM(mood_num) FROM like_mood WHERE img_id= '$imageid' 

例子..

$sql = mysql_query("SELECT SUM(mood_num) FROM like_mood WHERE img_id= '$imageid'"); 
$sql = mysql_fetch_array($sql); 
$total = $sql[0];