如何获取连续包含 technology_id = 1 和 technology_id = 2 的project_id？
+------------+---------------+
| project_id | technology_id |
+------------+---------------+
| 1 | 1 |
| 1 | 2 |
| 3 | 2 |
| 7 | 1 |
| 9 | 1 |
+------------+---------------+
最佳答案
按 product_id 分组，并仅采用同时具有 technology_id 的组
select project_id
from your_table
where technology_id in (1,2)
group by project_id
having count(*) = 2
关于jquery - 多对多关系中的sql查询返回单个记录，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38111219/