如何从三个最新行中随机获取？

Question

我想知道如何从一张桌子中选出最近三排中的一根。

我有这个：

"SELECT * FROM blog_content ORDER BY id DESC LIMIT 0,3"

我想：将结果保存在一个数组中，随机0-2并从数组中选择，但由于行数很多，所以不行。

Answer 1

如果我理解正确，你想从最新的3中随机选择一个。尝试子查询：

SELECT * FROM (SELECT * FROM blog_content ORDER BY id DESC LIMIT 0,3) t ORDER BY RAND() LIMIT 1

Answer 2

SELECT * FROM
    (SELECT * FROM blog_content ORDER BY id DESC LIMIT 0,3) last_three
ORDER BY RAND() LIMIT 1;

Answer 3

SELECT * FROM (SELECT * FROM blog_content ORDER BY id DESC LIMIT 0,3) AS recentBlogs ORDER BY RAND() LIMIT 1

为我工作。