mysql - sql在按其他列分组后选择并显示一列的所有值

Question

我有下表，其中存储了每位车手的得分以及他所代表的车队。

driver    team     points
-------------------------
Josh      Mercedes   12
Aron      BMW         5
Ben       Mercedes    9
Jake      BMW        17
Mike      BMW         7
Brad      Chevrolet   3

现在我想显示每个车队的分数+车队中所有车手的名字。

期望的输出:

BMW         29     Aron, Jake, Mike
Mercedes    21     Josh, Ben
Chevrolet    3     Brad

查询: 我的查询的问题是它只显示第一个司机的名字。我必须使用什么函数来包含所有驱动程序的名称？

<?php
$sql = "SELECT driver, team, points, SUM(points) AS totals FROM `example-table` GROUP BY team ORDER BY `points` DESC";

$stmt = $pdo->prepare($sql);
$stmt->execute();

if($stmt->rowCount())
{
while ($result = $stmt->fetch(PDO::FETCH_ASSOC))
{

echo $result['team'];
echo $result['driver'];
echo $result['totals'];
?>
<br>

<?php 
}// end while
}// end if
else {
 echo '0 results';
}// end else
?>

Answer 1

使用Group_Concat功能

SELECT team, SUM(points) AS totals,group_concat(driver)
FROM `example-table` 
GROUP BY team 
ORDER BY `points` DESC