MySQL查詢到在一個月內恢復大部分建議書

Question

我有以下MySQL表命名爲 「建議」：

• PROPOSAL_ID
• proposal_user（INT
• proposal_book（INT）
• proposal_date（年月日）

用戶每個月都會推薦一本書，所以每個月會有50-100本書，我想知道是否有辦法編寫一個查詢，可以返回給定月份中最受歡迎的書籍。

在此先感謝。

Answer 1

SELECT proposal_book, COUNT(*) AS cnt 
FROM proposals 
WHERE proposal_date >= $first_day_of_month 
     AND proposal_date < $first_day_of_month + INTERVAL 1 MONTH 
GROUP BY 
     proposal_book 
ORDER BY 
     cnt DESC 
LIMIT 10 

Answer 2

SELECT * FROM proposals GROUP BY proposal_book ORDER BY COUNT(proposal_id) DESC