SQL orderby/case問題：orderdirection失敗

Question

我有一個存儲過程，提供一個學生表，它需要按姓氏，名稱等命令...它還需要按升序，降序排序，具體取決於參數@排序依據...

代碼：

ORDER BY 
CASE 
WHEN @orderby = 'studentkey' THEN Studentkey END ASC, 
CASE 
WHEN @orderby = 'studentkey' and @desc = 1 THEN Studentkey END DESC, 
CASE 
WHEN @orderby = 'initials' THEN Initials END ASC, 
CASE 
WHEN @orderby = 'initials' and @desc = 1 THEN Initials END DESC, 
CASE 
WHEN @orderby = 'firstname' THEN Firstname END ASC, 
CASE 
WHEN @orderby = 'firstname' and @desc = 1 THEN Firstname END DESC, 
CASE 
WHEN @orderby = 'nickname' THEN Nickname END ASC, 
CASE 
WHEN @orderby = 'nickname' and @desc = 1 THEN Nickname END DESC, 
CASE 
WHEN @orderby = 'insertion' THEN Insertion END ASC, 
CASE 
WHEN @orderby = 'insertion' and @desc = 1 THEN Insertion END DESC, 
CASE 
WHEN @orderby = 'surname' THEN Surname END ASC, 
CASE 
WHEN @orderby = 'surname' and @desc = 1 THEN Surname END DESC 
NED

有在@desc = 1個@desc = 0輸出之間的差別，但不是我的願望......

有誰有解？

Answer 1

試試這個：

CASE 
WHEN @orderby = 'studentkey' and @desc = 0 THEN Studentkey END ASC, 
CASE 
WHEN @orderby = 'studentkey' and @desc = 1 THEN Studentkey END DESC, 
...