如何显示超过3个“出价”的所有“文章”？

Question

我想要显示超过3个“出价”的所有“优惠”的“ArticleName”。应输出“出价”的数量。

我不知道怎么写下来。但我想我知道逻辑。它应该计算表“bid”和“OID”列的相同数字，最后它应该粘贴超过3的数字。

照片：

Answer 1

SELECT * FROM (
    SELECT o.ArticleName, count(b.BID) as numberOfBids
    FROM Offer as o INNER JOIN bid as b ON o.oid = b.oid
    GROUP BY o.ArticleName
) as c
WHERE c.numberOfBids > 3

Answer 2

这很容易：

Select ArticleName
     , count(*) NumberOfBids
  from Offer o
  join Bid b
    on b.oid = o.oid
 group by ARticleName
having count(*) >= 3