过去 6 个月的 SQL Server 查询

Question

每次更新数据时，我都希望它只反映最近 6 个月的数据。以下是我当前的查询。有人可以帮我吗？

SELECT ar.[Report Date]
,ar.Facility
,SUM (ar.[0-30]) AS [0-30]
,SUM (ar.[31-60]) AS [31-60]
,SUM (ar.[61-90]) AS [61-90]
,SUM (ar.[91-120]) AS [91-120] 
,SUM (ar.[120+]) AS [120+]
FROM DBO.ARByPayer AS ar
WHERE ar.[Current Financial Class] <> 'Lien'
GROUP BY ar.Facility, ar.[Report Date]
ORDER BY ar. [Report Date]

Answer 1

如果我正确理解您的要求，您需要将其添加到您的 where 子句中：

and ar.[Report Date] > DATEADD(m, -6, GetDate())