sql join 与列上的多个条件

Question

我认为我无法通过工会实现这一目标。 例如，我想要所有关键列是“品牌”且价值列是“Burago”的汽车。 最重要的是，键列价格在 100 到 220 之间。

我应该做子查询还是什么？如果我也想查询值为“sport”的键“type”怎么办？ 该查询仅在我使用一个 where 子句时返回某些内容，而在使用以下查询时不返回任何内容。

select `posts`.`title` from `posts`
  inner join `meta` on `posts`.`id` = `meta`.`metable_id`
  where `meta`.`key` = "price" and `meta`.`value` between 100 and 220
   and `meta`.`key` = "brand" and `meta`.`value` = "Burago"
 group by `posts`.`id`

元表：

ID  | post_id |   key     |       value
----------------------------------------------------
69  |   8     |   brand   | some-brand
----------------------------------------------------
70  |   8     |   type    | sport
----------------------------------------------------
70  |   8     |   price   | 100
----------------------------------------------------
71  |   8     |   brand   | some-other-brand
----------------------------------------------------
70  |   8     |   type    | coupe
----------------------------------------------------
72  |   8     |   price   | 150
----------------------------------------------------
73  |   8     |   brand   | some-brand
----------------------------------------------------
70  |   8     |   type    | cabrio
----------------------------------------------------
74  |   8     |   price   | 100
----------------------------------------------------
75  |   8     |   brand   | some-brand
----------------------------------------------------
70  |   8     |   type    | sport
----------------------------------------------------
76  |   8     |   price   | 250

Answer 1

select `posts`.`title` from `posts`
  inner join `meta` on `posts`.`id` = `meta`.`metable_id`
  where `meta`.`key` = "price" and `meta`.`value` between 100 and 220
   and `meta`.`key` = "brand" and `meta`.`value` = "Burago"
 group by `posts`.`id`
having COUNT(DISTINCT `meta`.`key`) = 2