在以下的神秘问题中,Im试图选择所有具有母体特征的产品。 I m 采用表面上的回报产品,其特征是1 OR 特征2...... 我应该用什么来代替本国?
SELECT *, f.name as feature, p.productcode as productcode, p.name as name
from product p
left join productfeatures pf on p.productcode = pf.productcode
left join features f on pf.featureid = f.id
where f.id in (1, 2, 3)
group by p.productcode
添加这一句
having count(f.id) = 3
这只会导致有3个<代码>f.id,而不仅仅是1个或2个。
如果有的话,请在<条码>上填写<>。 条款,你需要扩大这一价值。 例:
where f.id in (1, 2, 3, 4, 5)
group by p.productcode
having count(f.id) = 5
I noticed that there were some threads with similar questions, and I did look through them but did not really get a convincing answer. Here s my question: The subquery below returns a Table with 3 ...
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