我的總和（總計）顯示了所有用戶的總和

Question

我明白了總數。但它包括所有用戶。我希望它僅通過登錄用戶顯示總金額。請幫幫我！

<?php 
    $conn = new mysqli($servername, $username, $password, $dbname); 
    foreach($conn->query('SELECT total FROM event') as $row) { 
    echo "<td><span style=font-weight:bold> " . number_format($row['total'],2) . "</span></td>"; 
    } 
?> 

Answer 1

試試這個代碼：

<?php 
    $user_id = 5; //set login user id here 
    $conn = new mysqli($servername, $username, $password, $dbname); 
    foreach($conn->query('SELECT COUNT(event_id) as total FROM event WHERE user_id ='.$user_id) as $row) { 
    echo "<td><span style=font-weight:bold>" . number_format($row['total'], 2) . "</span></td>"; 
    } 
?> 

Answer 2

試試這個代碼

使用此查詢獲取當前用戶總

"Select sum(total) from event where name='$_SESSION['username']'"; 

使用這個網址：http://www.sqlcourse2.com/agg_functions.html

Answer 3

試試這個代碼

<?php $user_id = 1; 
$conn = new mysqli($servername, $username, $password, $dbname); 
$query = $conn->query("SELECT COUNT(event_id) as total FROM event WHERE user_id =".$user_id); 
$query_data = $query->fetch_assoc(); 
echo "<td><span style=font-weight:bold>". number_format($query_data['total'], 2) . "</span></td>"; ?>