php中的可用性计算逻辑
这是一个mysql查询结果。现在,我必须根据每个challan Id计算可用的php数量。预期结果将是:php中的可用性计算逻辑,php,mysql,Php,Mysql,这是一个mysql查询结果。现在,我必须根据每个challan Id计算可用的php数量。预期结果将是: ChallanId | Avaiable Qty | unitCostPrice | totalPrice 11 | 7 | 2 | 14 12 | 10 | 1 | 10 如何在php中实现它?使用foreach
ChallanId | Avaiable Qty | unitCostPrice | totalPrice
11 | 7 | 2 | 14
12 | 10 | 1 | 10
如何在php中实现它?使用foreach或任何其他技巧。虽然您希望为
PHP
解决方案实现这一点,但在这里,我认为SQL query也可以做到这一点:
select
ChallanId,
sum(case when Narration = 'in' then ItemIn when Narration = 'out' then 0 - ItemOut end) as Avaiable_Qty,
unitCostPrice,
sum(case when Narration = 'in' then ItemIn when Narration = 'out' then 0 - ItemOut end) * unitCostPrice as totalPrice
from (your query here...)
having Avaiable_Qty > 0
group by ChallanId
虽然您希望为
PHP
解决方案实现这一点,但在这里,我认为SQL query也可以做到这一点:
select
ChallanId,
sum(case when Narration = 'in' then ItemIn when Narration = 'out' then 0 - ItemOut end) as Avaiable_Qty,
unitCostPrice,
sum(case when Narration = 'in' then ItemIn when Narration = 'out' then 0 - ItemOut end) * unitCostPrice as totalPrice
from (your query here...)
having Avaiable_Qty > 0
group by ChallanId
这是一种psuedo代码,因为您没有与PHP共享您的实现 首先,您可以假设ItemIn或ItemOut的叙述不是零,事实上这样做可能更好,因为您可以在同一行中引入项目in和项目out。但这不是问题所在
$output = array();
foreach ($dbResults as $row) {
// Create an output entry
if (!array_key_exists($row['ChallanID'], $output)) {
$output[$row['ChallanID']] = array('Qty' => 0, 'CostPrice' => 0, 'Total' => 0);
}
// Add to totals
$output[$row['ChallanID']]['Qty'] += ($row['ItemIn'] - $row['ItemOut']);
$output[$row['ChallanID']]['CostPrice'] = $row['UnitCostPrice']; // you may want to average this instead?
$output[$row['ChallanID']]['Total'] += $output[$row['ChallanID']]['Qty'] * $output[$row['ChallanID']]['CostPrice'];
}
$output
现在应该包含所需的输出。未经测试。这是一种psuedo代码,因为您没有与PHP共享您的实现
首先,您可以假设ItemIn或ItemOut的叙述不是零,事实上这样做可能更好,因为您可以在同一行中引入项目in和项目out。但这不是问题所在
$output = array();
foreach ($dbResults as $row) {
// Create an output entry
if (!array_key_exists($row['ChallanID'], $output)) {
$output[$row['ChallanID']] = array('Qty' => 0, 'CostPrice' => 0, 'Total' => 0);
}
// Add to totals
$output[$row['ChallanID']]['Qty'] += ($row['ItemIn'] - $row['ItemOut']);
$output[$row['ChallanID']]['CostPrice'] = $row['UnitCostPrice']; // you may want to average this instead?
$output[$row['ChallanID']]['Total'] += $output[$row['ChallanID']]['Qty'] * $output[$row['ChallanID']]['CostPrice'];
}
$output
现在应该包含所需的输出。未经测试。我会通过更智能的查询在SQL中进行计算
select
ChallanId,
UnitCostPrice,
sum(`ItemIn`)-sum(`ItemOut`) as AvailableQty,
(sum(`ItemIn`)-sum(`ItemOut`))*UnitCostPrice as totalPrice
from tbl
group by ChallanId
我会通过使用更智能的查询在SQL中进行计算
select
ChallanId,
UnitCostPrice,
sum(`ItemIn`)-sum(`ItemOut`) as AvailableQty,
(sum(`ItemIn`)-sum(`ItemOut`))*UnitCostPrice as totalPrice
from tbl
group by ChallanId
你能告诉我们你试过什么吗?你能告诉我们你试过什么吗?