MYSQL從兩行中隨機選擇

Question

有人可以幫助我解決這個問題。 我有這個表樣本：

文件表

• UID
• 文件
• uploaded_on_date
• VIEW_COUNT

我要考慮的是前30名最最近上傳的文件和前30名最多瀏覽文件然後從他們隨機選擇和限制10。

我是新來的這個mysql複雜查詢。示例查詢會很好，我將能夠理解它。 謝謝。

Answer 1

SELECT 
    * 
FROM 
(
SELECT 
    * 
FROM 
    tablefile 
ORDER BY 
    uploaded_on_date DESC 
LIMIT 30 
UNION SELECT 
* 
FROM 
    tablefile 
ORDER BY 
    view_count DESC 
LIMIT 30 
) 
ORDER BY 
    RAND() 
LIMIT 10; 

Answer 2

select * from (
    select * from table order by upload_on_date desc limit 30 
    union 
    select * from table order by view_count desc limit 30) t 
order by rand() limit 10