MySql有助于编写查询

Question

假设我有一个包含3列的表格，如下所示

 ------------------------------
|id | recipe_id | sub_category |
 ------------------------------
| 1 | 80        | 2            |
| 2 | 80        | 6            |
| 3 | 80        | 3            |
| 4 | 82        | 1            |
| 5 | 83        | 2            |
| 6 | 85        | 5            |
| 7 | 80        | 10            |
 ------------------------------

如何获得包含子类别2和6的食谱ID？ 是否可以使用mysql查询获取它？

Answer 1

试试这个：

SELECT recipe_id
FROM mytable
WHERE sub_category IN (2, 6)
GROUP BY recipe_id
HAVING COUNT(DISTINCT sub_category) = 2

Demo here