如何在此SQL查询中显示过去20天

我想在最后更改标准。到过去的20天。是这个？（DateTime.Now.Year） - 20？如何在此SQL查询中显示过去20天

sqlT1 = "SELECT ROW_NUMBER() OVER(ORDER BY ID_KEY DESC) AS RN,* From(Select distinct f.FACILITY_NAME, ID_KEY, [BATCH] AS column1, [IMPORTDATE], [DATEBILLED], [RX], [DATEDISPENSED], [DAYSUPPLY], [PAYTYPE], [NPI], [PHYSICIAN], [COST], [QUANTITY], [MEDICATION], A.[NDC], " + 
         " case when (COST > 0 AND DAYSUPPLY > 0) then (COST/DAYSUPPLY) * 30 else 0 end [30DayCost] , [PATIENTNAME], [ROUTEOFADMIN], [INVOICECAT], [COPAY], [BRAND], [TIER], [SKILLLEVEL], [STAT] STATUS, [LASTTASKDATE],SEQNO, 'please bring to the attention of the administrator.' SUBST_INSTRUCTIONS , f.FACILITY_ID " + 
         " FROM [LMI].[T_CHARGES] A Left Outer Join PBM.FACILITY f on A.FACILITYNPI = f.FACILITY_NPI " + 
         " Where COST > 500 " + 
         " AND [TIER] = 'T1' and month(A.DATEDISPENSED) = " + DateTime.Now.Month + " and year(A.DATEDISPENSED) = " + DateTime.Now.Year + "" + 
         sqlWhere + " AND f.FACILITY_ID IN (" + selected + ")";

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2014-04-01 Adams

这看起来很容易受到SQL注入攻击。你知道那些是对的吗？ –

SQL注入与此没有任何共同之处。 – Metaphor

要获得之日起20天前，你可以使用SQL函数DATEADD：

WHERE A.DATEDISPENSED >= DATEADD(dd,-20,GetDate())

来源

2014-04-01 20:40:55 Metaphor

好，我不知道要改变你的代码你，但通常在SQL使用getdate()获得今天的日期，并使用dateadd(d,-20,getdate())拿到20日前所以使用

（T-SQL）：

testingdate between dateadd(d,-20,getdate()) and getdate()

在

您的where子句

来源

2014-04-01 20:21:43 RadioSpace

[dateadd link]（http://technet.microsoft.com/en-us/library/ms186819.aspx）和[getdate（）]（http://technet.microsoft.com/zh-cn/library/ms188383的.aspx） – RadioSpace

如何在此SQL查询中显示过去20天

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