sql server建多個文件組

DateTime dtNow = DateTime.Now;
DateTime dtNow2 = dtNow.Date;
Console.WriteLine("dtNow=" + dtNow);
Console.WriteLine("dtNow2=" + dtNow2);

Create function [dbo].[GetDateOnly]
(
    @d as datetime
)
returns smalldatetime
 AS
begin
    declare @OutputD smalldatetime;
    declare @y int=DATEPART(year, @d);
    declare @MH int=DATEPART(month, @d);
    declare @dy int=DATEPART(day, @d);
    declare @s varchar(50);
    set @s=convert(varchar(4),@y)+'-'+convert(varchar(2),@MH)+'-'+convert(varchar(2),@dy);
    set @OutputD=convert(smalldatetime,@s);
    return @OutputD;
end