虚拟列mysql

Question

是否可以在此SELECT语句中添加虚拟列，并为每部手机添加产品的count（）？

我想动态创建一个名为count的新列，它将是手机的产品数量。例如适用于iphone 5s的10款产品。

    $query"SELECT *, count(products.phone_id) as count..."

我的查询是：

    $query="SELECT * FROM phones INNER JOIN products on phones.id=products.phone_id";
    $query .= " WHERE phones.name LIKE '%". $searchInput . "%'";
    $query .= " AND phones.id IN (SELECT phone_id FROM products WHERE phone_id IS NOT NULL GROUP BY phone_id)";
    $query .= " GROUP BY phones.id";

Answer 1

试试这个

 $query="SELECT *,count(phones.id) as count FROM phones INNER JOIN products on phones.id=products.phone_id";
    $query .= " WHERE phones.name LIKE '%". $searchInput . "%'";
    $query .= " AND phones.id IN (SELECT phone_id FROM products WHERE phone_id IS NOT NULL GROUP BY phone_id)";
    $query .= " GROUP BY phones.id";