SQL顺序/案例问题：订单方向失败

Question

我有一个存储过程，提供一个学生表，它需要按姓氏，名称等排序......它还需要按升序，降序排序，具体取决于参数@orderby ...

代码：

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

@desc = 1和@desc = 0之间的输出存在差异，但不是我想要的......

有没有人有解决方案？

Answer 1

试试这个：

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