我需要帮助使用CAST才能返回月/日

Question

SELECT DateAdded, 
    CAST(DateAdded AS date USING 'mm:dd') AS MonthDay 
FROM Products; 

继续收到“AS”错误。

Answer 1

使用Month和Day函数从日期类型中提取month和day。尝试这个。

SELECT DateAdded,  
     Convert(varchar(2),month(DateAdded))+':'+ 
       Convert(varchar(2),Day(DateAdded)) As MonthDay 
FROM Products; 

或convert使用101风格和更换/与:

SELECT DateAdded,  
     Replace(Left(Convert(varchar(20),DateAdded,101),4),'/',':') As MonthDay 
FROM Products; 

或者Datepart

SELECT DateAdded,  
     Convert(varchar(2),Datepart(Month,DateAdded))+':'+ 
       Convert(varchar(2),Datepart(Day,DateAdded)) As MonthDay 
FROM Products; 

Answer 2

这里是一个可能的解决方案使用投

SELECT 
    DateAdded, 
    CAST(DateAdded AS date) AS Date, 
    CAST(DateAdded AS time) AS Time, 
    right('0' + cast(month(DateAdded) as varchar(2)),2) + ':' 
     + right('0' + cast(day(DateAdded) as varchar(2)),2) AS MonthDay 
FROM Products