sql - 如何动态排序 2 个 SQL 字段的 asc 和 desc

Question

我想要订购一个 SQL 选择查询，其中排序依据中有 2 个字段。然后我需要决定一个是降序，另一个是升序。这是怎么做到的

我想要这样的东西:

Select * from Customer
Order By Date @asc_or_Desc_date, Name @asc_or_Desc_name

有人有什么想法吗？

我已经尝试过，但似乎失败了

SELECT 

    Customer_ID,                        
    Name,                               
    Age                                         

FROM #Customer
ORDER BY 

    CASE WHEN @fieldSort ='Name'
        THEN ROW_NUMBER() over (order by Name) * 
            case when @directionOfSort = 'A' 
                THEN 1 ELSE -1 END,
             ROW_NUMBER() over (order by Age) * 
            case when @directionOfSort = 'A' 
                THEN 1 ELSE -1 END,
        END

有人知道如何排序吗？

Answer 1

SELECT 
  Customer_ID,                        
  Name,                               
  Age                                         
FROM
  #Customer
ORDER BY 
  CASE WHEN @field = 'Name' AND @direction = 'A' THEN Name ELSE NULL END ASC,
  CASE WHEN @field = 'Name' AND @direction = 'D' THEN Name ELSE NULL END DESC,
  CASE WHEN @field = 'Age'  AND @direction = 'A' THEN Age  ELSE NULL END ASC,
  CASE WHEN @field = 'Age'  AND @direction = 'D' THEN Age  ELSE NULL END DESC

不过，我不想在许多不同的组合上这样做。如果你有很多组合，我会根据以下内容做一些事情......

SELECT 
  Customer_ID,                        
  Name,                               
  Age                                         
FROM
(
  SELECT
    Customer_ID,
    Name,
    ROW_NUMBER() OVER (ORDER BY Name) AS "name_order",
    Age,
    ROW_NUMBER() OVER (ORDER BY Age)  AS "age_order"
  FROM
    #Customer
)
  AS [data]
ORDER BY 
  CASE @field1
    WHEN 'Name' THEN CASE @direction1 WHEN 'A' THEN name_order ELSE -name_order END
    WHEN 'Age'  THEN CASE @direction1 WHEN 'A' THEN age_order  ELSE -age_order  END
    ELSE NULL
  END,
  CASE @field2
    WHEN 'Name' THEN CASE @direction2 WHEN 'A' THEN name_order ELSE -name_order END
    WHEN 'Age'  THEN CASE @direction2 WHEN 'A' THEN age_order  ELSE -age_order  END
    ELSE NULL
  END

根据需要重复多次...

注意:仅仅因为可以这样做，并不意味着应该这样做。