我试图创建一个带有计数的制造商列表。
这是我的查询
$query = $this->pdo->prepare('SELECT manufacture, count(*) AS count
FROM listed_watches
GROUP BY manufacture');
但是当我执行 print_r 时,它会复制结果。它显示“制造”和“计数”,但也显示[0]和[1],为什么?
我只想显示[制造商]、[数量]
Array
(
[0] => Array
(
[manufacture] => Audemars Piguet
[0] => Audemars Piguet
[count] => 2
[1] => 2
)
[1] => Array
(
[manufacture] => Bell and Ross
[0] => Bell and Ross
[count] => 3
[1] => 3
)
[2] => Array
(
[manufacture] => Bulova
[0] => Bulova
[count] => 1
[1] => 1
)
)
最佳答案
试试这个:
$result = $query->fetchAll(PDO::FETCH_ASSOC);
您可以在初始化连接时默认使用此获取方法:
$pdo_options[PDO::ATTR_DEFAULT_FETCH_MODE] = PDO::FETCH_ASSOC;
关于php - sql group by 重复结果,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28085431/