Question

我有一个查询这个计数案例，我用它根据案例调整一些总计。这是查询：

$user_attrib = some_value;
$user_size = some_value;
$items = [218, 219];
$items = join(",", $items);


SELECT owned_items.model_id,
       Count(owned_items.model_size_id) AS total_owned,
       makes.make,
       items.model_name,
       items.picture,
       items.color,
       items.material,
       Count(CASE item_sizes.id WHEN '1' THEN item_sizes.id ELSE NULL END) AS '1',
       Count(CASE item_sizes.id WHEN '2' THEN item_sizes.id ELSE NULL END) AS '2',
       Count(CASE item_sizes.id WHEN '3' THEN item_sizes.id ELSE NULL END) AS '3',
       Count(CASE item_sizes.id WHEN '4' THEN item_sizes.id ELSE NULL END) AS '4',
       Count(CASE item_sizes.id WHEN '5' THEN item_sizes.id ELSE NULL END) AS '5',
       Count(CASE item_sizes.id WHEN '6' THEN item_sizes.id ELSE NULL END) AS '6',
       Count(CASE item_sizes.id WHEN '7' THEN item_sizes.id ELSE NULL END) AS '7',
       Count(CASE item_sizes.id WHEN '8' THEN item_sizes.id ELSE NULL END) AS '8',
       Count(CASE item_sizes.id WHEN '9' THEN item_sizes.id ELSE NULL END) AS '9',
       Count(CASE item_sizes.id WHEN '10' THEN item_sizes.id ELSE NULL END) AS '10',
       Count(CASE item_sizes.id WHEN '11' THEN item_sizes.id ELSE NULL END) AS '11',
       Count(CASE item_sizes.id WHEN '12' THEN item_sizes.id ELSE NULL END) AS '12',
       Count(CASE item_sizes.id WHEN '13' THEN item_sizes.id ELSE NULL END) AS '13',
       Count(CASE item_sizes.id WHEN '14' THEN item_sizes.id ELSE NULL END) AS '14',
       Count(CASE item_sizes.id WHEN '15' THEN item_sizes.id ELSE NULL END) AS '15'
FROM   owned_items
       INNER JOIN owned_item_user
               ON owned_items.id = owned_item_user.owned_item_id
       INNER JOIN users
               ON owned_item_user.user_id = users.id
       INNER JOIN item_sizes
               ON owned_items.model_size_id = item_sizes.id
       INNER JOIN items
               ON owned_items.model_id = items.id
       INNER JOIN makes
               ON owned_items.make_id = makes.id      
WHERE  users.attrib_id = $user_attrib
       AND users.size_id = $user_size
       AND owned_items.model_id IN ($items)
GROUP  BY owned_items.model_id

我想推广数据，这样如果我添加第16个案例，我不必手动添加另一行，我只想返回有结果的案例＆gt; 0。对于第一部分，我尝试使用此pivot dynamic tables调整代码但没有成功。第二部分我尝试设置HAVING Count(CASE item_sizes.id WHEN '1' THEN item_sizes.id ELSE NULL END) AS '1' > 0（等等）也没有成功。

Answer 1

您可以使用分组依据+计数

Select item_sizes.id, count(*) from item_sizes where item_sizes.id between 1 and 15 group by item_sizes.id;

mysql枢轴动态表，只返回count＆gt; 0

1 个答案: