Oracle SQL中的CASE表达式

Question

使用此SQL查询时出现错误。有人可以帮忙吗？

select *
    case 
        when TO_CHAR (current_date, 'DY', 'NLS_DATE_LANGUAGE=ENGLISH') = 'TUE' then "today is tuesday"
        else  "today is not tuesday"
    end as Todate
from
    dual

代码只是一个演示。如果可行，那么我有计划实施更多的东西。

Answer 1

如评论中所述，您需要删除*并将"编辑为'：

select 
    case 
        when TO_CHAR (current_date, 'DY', 'NLS_DATE_LANGUAGE=ENGLISH') = 'TUE' then 'today is tuesday'
        else  'today is not tuesday'
    end as Todate
from
    dual