Question

我有下一个mysql查询：

    $productn = $jdb->query('SELECT t2.title FROM '.DB_PREFIX.'shopping_cart AS t1 LEFT JOIN '.DB_PREFIX.'shop_order_details AS t2 ON t1.shopid WHERE t1.session = "'.smartsql($_SESSION['shopping_cart']).'"');

while ($rowp = $productn->fetch_assoc()) {
// my product title
 $productname = $rowp["title"];
}

使用print_r（$ productname）;我得到的东西是：

Name1Name1Name1Name2Name2

我希望显示如下内容：

3 x Name1 2 x Name2

OR

3 x Name1,2 x Name2

可以做到这一点吗？

Answer 1

SQL查询将是这样的：

select name,count(name) from table group by name ;

希望这会对你有所帮助。

Answer 2

您可能希望按标题分组并计算每个分组的出现次数。

SELECT t2.title, COUNT(t2.title)
FROM shopping_cart AS t1
LEFT JOIN shop_order_details AS t2 ON t1.shopid
WHERE t1.session = <session>
GROUP BY t2.title

查看COUNT(*)和GROUP BY函数参考。

Answer 3

您可以像这样使用count（*）组功能关闭组

$productn = $jdb->query('SELECT t2.title, count(t2.title) num FROM '.DB_PREFIX.'shopping_cart AS t1 LEFT JOIN '.DB_PREFIX.'shop_order_details AS t2 ON t1.shopid WHERE t1.session = "'.smartsql($_SESSION['shopping_cart']).'" group by t2.title');

while ($rowp = $productn->fetch_assoc()) {
// my product title
 $productname = $rowp["title"];
 $numberofproducts  = $rowp["num"];
}

这应该有用......

Answer 4

如果您想使用PHP，请使用：

$total_products = array();
while ($rowp = $productn->fetch_assoc()) {
   $productname = $rowp['title'];
   if(isset($total_products[$productname])) {
      ++$total_products[$productname];
   }
   else
   {
      $total_products[$productname] = 1;
   }
}

UPD 1： 以所需格式显示产品：

foreach($total_products as $name => $num) {
   echo "{$num} x {$name}, ";
}

Answer 5

好的，我终于能够做出我想要的东西了，所以我想在这里分享以备将来使用。

这就是我所做的：

$productn = $jdb->query('SELECT t2.title, count(t2.title) num FROM '.DB_PREFIX.'shop_order_details AS t2 WHERE t2.orderid ="'.$orderid.'" GROUP BY t2.title');

while($registro=$productn->fetch_array()){
 echo $registro['title'].' x '.$registro['num']."<br>";
}

我在班上定义了fetch_array（）：

    function fetch_assoc() {
    if($this->result) {
        return mysql_fetch_assoc($this->result);
    } else {
        return false;
    }
}

感谢大家的帮助。我向每个人添加了分数！

计算具有相同名称和显示名称和编号的变量

5 个答案: