Sql server 2008 如何在SQL Server中获取不同条件下的数据？

此查询显示今天插入的数据。这是正确的，但我也希望，如果今天没有输入任何数据，我想显示上次输入的数据。我该怎么做？请帮帮我

此代码将选择最新插入的行

ALTER PROCEDURE [dbo].[K_FS_GetFEEDMRPDetails] 
AS
BEGIN
SET NOCOUNT ON;

    Select 
        FT.FeedType,
        round(MR.rateperkg, 3) as rateperkg,
        round(MR.rateper50kg, 3)as rateper50kg 
    from 
        K_FS_FeedMrpDetails MR 
    inner join 
        k_FPS_FeedType FT on FT.sno = MR.feedtype 
    where 
        date = convert(varchar(10), getdate(), 101)
 END

---

where子句中的日期列属于哪个表？仅限K_FS_FeedMrpDetails。

 SELECT FT.FeedType,
        Round( MR.rateperkg,3)As rateperkg,
        Round( MR.rateper50kg,3)As rateper50kg 
 FROM   K_FS_FeedMrpDetails MR
        inner join k_FPS_FeedType FT
            On FT.sno=MR.feedtype
 WHERE date in (SELECT TOP 1 date FROM K_FS_FeedMrpDetails ORDER BY date Desc )