php - SQL匹配表

Question

我有两个查询结果，一个是:

amount | percent
100    | 10
200    | 20
300    | 30
400    | 40

第二个是:

sales
10
20
110
120
210
220
310
320

有没有办法得到这样的东西:

sales                      | percent
30 (this is sum below 100) | 10
230(this is sum between 100 and 200) | 20
430(this is sum between 200 and 300) | 30
630(this is sum between 300 and 400) | 40

我想用 PHP 数组和循环来完成它，但我不想向服务器发送很多请求。有什么建议吗？

Answer 1

子查询会多次执行查询，不好 用php做会更好 像这样(而不是查询我有 $first 和 $second 数组)

$first = array(
    array(
        'amount' => 100,
        'percent' => 10
    ),
    array(
        'amount' => 200,
        'percent' => 20
    ),
    array(
        'amount' => 300,
        'percent' => 30
    ),
    array(
        'amount' => 400,
        'percent' => 40
    )
);
$second = array(
    array(
        'sales' => 10
    ),
    array(
        'sales' => 20
    ),
    array(
        'sales' => 110
    ),
    array(
        'sales' => 120
    ),
    array(
        'sales' => 210
    ),
    array(
        'sales' => 220
    ),
    array(
        'sales' => 310
    ),
    array(
        'sales' => 320
    )
);

$result = array();
$second_len = count($second);
$s=0;
for ($i=0,$len=count($first); $i < $len; $i++) {
    $sum = 0;
    for (;$s < $second_len; $s++) {
        if ($second[$s]['sales'] <= $first[$i]['amount']) {
            $sum += $second[$s]['sales'];
        } else {
            break;
        }
    }
    $result[] = array(
        'sales' => $sum,
        'percent' => $first[$i]['percent']
    );
}

var_dump($result);