mysql日期格式化问题

select OrganLevelName,papername,
     DATE_FORMAT(tp.DateCreated,'%Y-%m-%d %H:%i') as DateCreated,
     tp.tpid,SavePaper,PaperSource,  

     CONCAT( DATE_FORMAT(ExamBegin,'%Y-%m-%d %H:%i'),
             ' - ', DATE_FORMAT(ExamEnd,'%Y-%m-%d %H:%i'))
    AS Exam,
      SelectedMode,UserAlias
 
    from tbtestpaper tp inner join tbPaperClass pc
   on tp.PCID=pc.PCID          
          inner join tbUser tu
   on tp.CreateUserID=tu.UserID           
          inner join tbOrgan org
   on pc.OrganID=org.OrganID   
     where 1=1  order by tp.DateCreated desc