PDO多次获取同一查询 [英] PDO multiple fetching of same query
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问题描述
我正在使用PDO :: FETCH_ASSOC从数据库中获取结果.问题是我在同一文件中做了两次.这是一个已知问题吗?有什么选择吗?
I am fetching the results from a db with PDO::FETCH_ASSOC. The issue is that I am doing it twice in the same file. Is that a known issue? What would be the alternative?
这是我的代码:
FIRST TIME
while($row = $ordersQuery->fetch(PDO::FETCH_ASSOC))
{
$totalAmount += $row['clientPrice']/100;
}
echo $totalAmount;
SECOND TIME
while($row = $ordersQuery->fetch(PDO::FETCH_ASSOC))
{
....
}
每当我删除第一个访存项时,第二个就可以正常工作.如果我同时拥有,则第二个不返回任何内容.
Whenever I remove the first fetching, the second works fine. If I have both, the second does not return anything.
谢谢!
推荐答案
您不能多次从数据库中获取数据.改为执行此操作:
You can't fetch from the DB multiple times like this. Do this instead:
$orders = $ordersQuery->fetchAll(PDO::FETCH_ASSOC);
...
foreach ($orders as $val) {
// stuff 1
}
...
foreach ($orders as $val) {
// stuff 2
}
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