MySQL获取所有分类和每个分类的前N条记录

作者：袖梨 2022-11-14
代码如下 复制代码
SELECT A1.*
FROM Article AS A1
INNER JOIN (SELECT A.Category,A.InsertDate
FROM Article AS A
LEFT JOIN Article AS B
ON A.Category = B.Category
AND A.InsertDate <= B.InsertDate
GROUP BY A.Category,A.InsertDate
HAVING COUNT(B.InsertDate) <= @N
) AS B1
ON A1.Category = B1.Category
AND A1.InsertDate = B1.InsertDate
ORDER BY A1.Category,A1.InsertDate DESC

相关文章

精彩推荐