如何在sql case语句中使用datename

Question

如何使用case语句确定当前日期是星期六，星期日还是星期几？我已经尝试了以下所以任何指针我要去哪里错将不胜感激。谢谢。

SELECT * FROM mytable WHERE day = (SELECT CASE aday 
             WHEN DATENAME(dw, GETDATE()) = 'Saturday' THEN 'Sat' 
             WHEN DATENAME(dw, GETDATE()) = 'Sunday' The 'Sun' 
             ELSE 'Weekday'); 

Answer 1

SELECT * FROM mytable WHERE day = (
    SELECT CASE DAYNAME(aday) 
     WHEN 'Saturday' THEN 'Sat' 
     WHEN 'Sunday' THEN 'Sun' 
     ELSE 'Weekday' END 
) 
;