如何制作这个sql。 （条件sql）

Question

查询：

  SELECT * 
    FROM Post 
ORDER BY Post.rating <-- Here , i want ( Post.rating * 5 ) when Post.recommended = 1 ) 

感谢所有人。

Answer 1

使用：

  SELECT p.*
    FROM POST p
ORDER BY CASE 
           WHEN p.recommended = 1 THEN p.rating * 5
           ELSE p.rating
         END

Answer 2

SELECT * FROM Post 
ORDER BY case Post.rating when 1 then post.rating * 5 else post.rating end

Answer 3

这有用吗？

SELECT *
  FROM Post
 ORDER BY CASE Recommended WHEN 1 THEN Rating * 5 ELSE Rating END

由于只有一个表，因此列引用是明确的，因此我删除了Post.前缀，这避免了水平滚动条。

Answer 4

  SELECT * 
    FROM Post 
ORDER BY Post.rating * IF(recommended = 1, 5, 1)

Answer 5

试

SELECT * 
    FROM Post 
ORDER BY if(Post.recommended = 1,Post.rating * 5,Post.rating)