我的总和（总计）显示了所有用户的总和

Question

我明白了总数。但它包括所有用户。我希望它仅通过登录用户显示总金额。请帮帮我！

<?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

试试这个代码：

<?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

试试这个代码

使用此查询获取当前用户总

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

使用这个网址：http://www.sqlcourse2.com/agg_functions.html

Answer 3

试试这个代码

<?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>"; ?>