使用PHP获得最低价格

Question

Product |  bprice  |    fprice
abcd    |  89      |    65
ebcd    |  39      |    105
fbcd    |  23      |    45
gbcd    |  89      |    
hbcd    |  89      |    65
ibcd    |          |    65
jbcd    |  50      |    50

SQL + PHP

如何在获取像

这样的mysql记录后使用php脚本获得每个产品的低价

对于abcd $ price = 65
  对于fbed $ price = 23
  对于gbcd $ price = 89
  等

Answer 1

min($bprice,$fprice)应该做你需要的。

<小时/> 编辑：修复以处理null

if (is_null($bprice)) {
    $price = $fprice;
} elseif (is_null($fprice)) {
    $price = $bprice;
} else {
    $price = min($bprice,$fprice);
}

Answer 2

使用group by语句：

SELECT MAX(bprice) AS maxbprice, MAX(fprice) AS maxfprice
FROM products
GROUP BY Product

Answer 3

$query = "SELECT * FROM product group by product";
$result = mysql_query($query) or die(mysql_error());
while ($row = mysql_fetch_object($result))
{
   if($row->bprice > $row->fprice)
   {
       $low=$row->fprice;
   } 
    else
   {
   $low=$row->bprice;
    }
}