sqlserver 自定义日期函数（yyyy-MM-dd）

if object_id('getDateFormat1') is not null  
    drop function getDateFormat1
go
create function getDateFormat1(@dt datetime)  
returns varchar(10)  
as  
begin  
    DECLARE @now VARCHAR(10)  
    set @now = STUFF(STUFF(
      CONVERT(char(8),@dt,112),
      5,0,N'-'),8,0,N'-')+N''
    return @now  
end

测试：

select dbo.getDateFormat1('2010-04-06 16:52:04.093');

结果 ：  

2010-04-06