2列sql中的排序順序

Question

我有這樣的表：

+----+------+-----------+-------------------+
| ID | Name | sortorder | overridesortorder |
+----+------+-----------+-------------------+
| 1  | kkkk | 4         | null              |
+----+------+-----------+-------------------+
| 2  | yyyy | 3         | null              |
+----+------+-----------+-------------------+
| 3  | zzzz | 2         | 4                 |
+----+------+-----------+-------------------+
| 4  | gggg | 1         | 3                 |
+----+------+-----------+-------------------+

我需要顯示如下所示的順序，用上面兩個排序順序列對表格進行排序：

+----+-------+-----------+-------------------+
| ID | Name  | sortorder | overridesortorder |
+----+-------+-----------+-------------------+
| 1  | kkkk  | **4**     | null              |
+----+-------+-----------+-------------------+
| 3  | zzzz  | 2         | **4**             |
+----+-------+-----------+-------------------+
| 2  | yyyy  | **3**     | null              |
+----+-------+-----------+-------------------+
| 4  | gggg  | 1         | **3**             |
+----+-------+-----------+-------------------+

Answer 1

這是你想要的嗎？

select t.*
from t
order by coalesce(overridessortorder, sortorder) desc;

Answer 2

獲取兩列的最大值並以此排序

SELECT ID, Name, sortorder, overridesortorder,
(SELECT Max(o) 
FROM (VALUES (sortorder), (overridesortorder)) AS value(o)) as order_value
FROM [TABLE] ORDER BY order_value

Answer 3

這就是你正在尋找的是

select * 
from table
order by isnull(overridesortorder, sortorder) desc, overridesortorder

Answer 4

SELECT ID, Name, sortorder, overridesortorder 
FROM t
ORDER BY COALESCE(overridessortorder, sortorder) DESC, sortorder DESC;

這將組合兩列，在它不為空的地方使用覆蓋，然后在它為空的地方排序，然后根據原始排序順序列對結果進行排序以打破聯系。 如果您想根據覆蓋打破平局，您只需切換第二種。

Answer 5

我再添加幾行

在這種情況下，如果 sortorder 和 overridesortorder 為空，我需要按名稱顯示順序

ID  Name    sortorder   OverriderSortOrder  order_value
3   zzzz    2   4   4
1   kkkk    4   NULL    4
2   yyyy    3   NULL    3
4   gggg    1   3   3
5   hhhh    NULL    NULL    NULL
6   bbbb    NULL    NULL    NULL
7   jjjj    NULL    NULL    NULL
8   cccc    NULL    NULL    NULL