declare @FileFullName varchar(40);

declare @FileName varchar(20);

declare @ExecSql varchar(100);

--declare @Filesuffix varchar(10);

--	@Filesuffix = '.bak';

	--set @FileName = convert(varchar(10),GETDATE(),112)+'.bak';

	set @FileName = Replace(Replace(Replace(convert(varchar(20),GETDATE(),120),'-',''),':',''),' ','')+'.bak';

--select @FileName;

	set @FileFullName = 'D:\DBBack\'+@FileName;

	select @FileFullName;

 set @ExecSql ='backup database Test to disk='''+@FileFullName +''' with init';

 select @ExecSql;

 exec (@ExecSql);