php - MySQL 和 PHP foreach 中的行总和

Question

我试图获取连续锻炼的总和，然后按总和对所有行进行排序，以获得团队所在的位置，并以正确的顺序列出。我现在有点迷失在自己的逻辑中，试图弄清楚这一点。我了解 MYSQL sum 函数，但似乎看不出在这种情况下如何使用它来帮助我。

所以像这样:

这是我当前的表架构:

CREATE TABLE workouts
(
team_id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
username VarChar(255) NOT NULL,
team_name VarChar(50) NOT NULL,
week1 INT NOT NULL,
week2 INT NOT NULL,
week3 INT NOT NULL,
week4 INT NOT NULL,
week5 INT NOT NULL,
week6 INT NOT NULL,
week7 INT NOT NULL,
week8 INT NOT NULL,
week9 INT NOT NULL,
week10 INT NOT NULL,
week11 INT NOT NULL,
week12 INT NOT NULL
) engine=innodb;

这是我到目前为止的展示:

<?php 
$count = 0;
$statement = $db->query('SELECT * FROM workouts');
foreach($statement as $row):
?>
<tr>
<td><?php $count++; ?></td>
<td><?php $row['team_name']; ?></td>
<td><?php $row['week1']; ?></td>
<td><?php $row['week2']; ?></td>
<td><?php $row['week3']; ?></td>
<td><?php $row['week4']; ?></td>
<td><?php $row['week5']; ?></td>
<td><?php $row['week6']; ?></td>
<td><?php $row['week7']; ?></td>
<td><?php $row['week8']; ?></td>
<td><?php $row['week9']; ?></td>
<td><?php $row['week10']; ?></td>
<td><?php $row['week11']; ?></td>
<td><?php $row['week12']; ?></td>
<td><?php  ?></td>
</tr>
<?php endforeach; ?>

Answer 1

嗯，根据您已经拥有的总结行的最简单答案是:

<?php 
$count = 0;
$statement = $db->query('SELECT * FROM workouts');
foreach($statement as $row):
?>
<tr>
<td><?php echo $count++; ?></td>
<td><?php echo $row['team_name']; ?></td>
<td><?php echo $row['week1']; ?></td>
<td><?php echo $row['week2']; ?></td>
<td><?php echo $row['week3']; ?></td>
<td><?php echo $row['week4']; ?></td>
<td><?php echo $row['week5']; ?></td>
<td><?php echo $row['week6']; ?></td>
<td><?php echo $row['week7']; ?></td>
<td><?php echo $row['week8']; ?></td>
<td><?php echo $row['week9']; ?></td>
<td><?php echo $row['week10']; ?></td>
<td><?php echo $row['week11']; ?></td>
<td><?php echo $row['week12']; ?></td>
<td><?php echo $row['week1'] + $row['week2'] + $row['week3'] + $row['week4'] + $row['week5'] + $row['week6'] + $row['week7'] + $row['week8'] + $row['week9'] + $row['week10'] + $row['week11'] + $row['week12']; ?></td>
</tr>
<?php endforeach; ?>

但是为了使用这个值来控制行的显示顺序，您需要让 MySQL 为您完成这项工作。

你想要做的是这样的:

<?php 

  $count = 0;
  $statement = $db->query('
    SELECT *, week1 + week2 + week3 + week4 + week5 + week6 + week7 + week8 + week9 + week10 + week11 + week12 AS Total
    FROM workouts
    ORDER BY Total
  ');
  foreach ($statement as $row):
?>
<tr>
<td><?php echo $count++; ?></td>
<td><?php echo $row['team_name']; ?></td>
<td><?php echo $row['week1']; ?></td>
<td><?php echo $row['week2']; ?></td>
<td><?php echo $row['week3']; ?></td>
<td><?php echo $row['week4']; ?></td>
<td><?php echo $row['week5']; ?></td>
<td><?php echo $row['week6']; ?></td>
<td><?php echo $row['week7']; ?></td>
<td><?php echo $row['week8']; ?></td>
<td><?php echo $row['week9']; ?></td>
<td><?php echo $row['week10']; ?></td>
<td><?php echo $row['week11']; ?></td>
<td><?php echo $row['week12']; ?></td>
<td><?php echo $row['Total']; ?></td>
</tr>
<?php endforeach; ?>