mysql與格式

Question

我想給我的房產評級以限制用戶評價一次。 因此，我在表格中保存了評分和用戶標識。

現在我想要該房產的總平均評級。

我用我這樣的查詢

SELECT SUM(rating_number) as rating_number, FORMAT((SUM(total_points)/SUM(rating_number),1) as average_rating FROM post_rating WHERE post_id = 9781 AND status = 1 

但我得到錯誤。我如何得到總平均評分。 感謝

Answer 1

使用此

SELECT SUM(rating_number) as rating_number, 
FORMAT((SUM(total_points)/SUM(rating_number)),2) as average_rating 
FROM post_rating WHERE post_id = 9781 AND status = 1