整理與Case語句使兩列用來排序

Question

我有此ORDER BY語句：

ORDER BY 
CASE WHEN @SortID = 1 AND @SortDirection = 'ASC' THEN ProjectID END ASC, 
CASE WHEN @SortID = 1 AND @SortDirection = 'DESC' THEN ProjectID END DESC 

我有一個名爲DateSort另一列。我需要的是：

WHEN @SortID = 1 AND @SortDirection = 'ASC' ......我想專案編號升序進行排序，DateSort ASC

WHEN @SortID = 1 AND @SortDirection = 'DESC' ......我想專案編號降序排序，DateSort ASC

即不管專案編號被分類ASC或DESC，我想記錄也由DateSort ASC

Answer 1

這難道不是工作進行排序？

ORDER BY 
CASE WHEN @SortID = 1 AND @SortDirection = 'ASC' THEN ProjectID END ASC, 
CASE WHEN @SortID = 1 AND @SortDirection = 'DESC' THEN ProjectID END DESC, 
DateSort ASC