如何为选定参数创建列？

Question

我有这个查询根据 selected LOV 参数提取结果：nvl(:Role, role))

SELECT role,subject 
FROM HS_SUBJECT_INCIDENTS 
WHERE entitlement not in(select entitlement from HS_SUBJECT_INCIDENTS where role in nvl(:Role, role))
AND subject in (select subject from HS_SUBJECT_INCIDENTS where role in nvl(:Role, role))

因此，如果用户 select 为参数值输入 'Finance'，结果现在显示：

|   Role    | Subject  | 
------------------------
| Marketing | Business |  
| Marketing | Business |  
| Analytics | Business |

我希望结果显示如下：

|   Role    | Subject  | SelectedParameter |
--------------------------------------------
| Marketing | Business |  Finance          |
| Marketing | Business |  Finance          |
| Analytics | Business |  Finance          |

我必须在 select 语句中输入什么才能包含 selected 的参数值列？

Answer 1

只是select它：

SELECT role, subject, :Role as SelectedParameter
FROM . . .

如何为选定参数创建列？

How to create column for selected parameter?

sql

oracle

bi-publisher