Question

我要查询我的下一张桌子

|id |Name|type      |
---------------------
|1  |B   |Secondary |
|2  |A   |Scholar   |
|3  |C   |University|

这可能是sql查询：

select * from invite order by  
        case "type" 
             when 'Scholar'   then 1 
             when 'Secondary' then 2
             when 'University' then 3
         end asc;

但是现在我需要按情况订购：示例：when 'Scholar' then 1 desc

有可能吗？

我的目标是按 id 进行排序，并按类型的示例进行排序：

|id |Name|type      |
---------------------
|1  |B   |Secondary |
|2  |B   |Secondary |
|3  |B   |Secondary |
|4  |A   |Scholar   |
|5  |A   |Scholar   |
|6  |C   |University|
|7  |A   |Scholar.  |

结果将是：

|id |Name|type      |
---------------------
|7  |A   |Scholar.  |
|5  |A   |Scholar   |
|4  |A   |Scholar   |
|3  |B   |Secondary |
|2  |B   |Secondary |
|1  |B   |Secondary |
|6  |C   |University|

Answer 1

我想你想要

order by  
    case "type" 
         when 'Scholar'    then 1 
         when 'Secondary'  then 2
         when 'University' then 3
    end,
    id desc

您也可以使用数组代替条件逻辑：

order by
    array_position(array['Scholar', 'Secondary', 'University'], "type"),
    id desc

Answer 2

您的问题表明，每个小组都需要一个新的方向：

order by (case "type" 
             when 'Scholar'   then 1 
             when 'Secondary' then 2
             when 'University' then 3
          end) asc;
         (case when "type" = Scholar then id end) desc,
         id asc;

但是，您的示例表明您只想要第二个order by键id desc。

如何按大小写和顺序排序？

2 个答案: