我有以下查询,该查询使用日期变量,该变量在存储过程内部生成:
DECLARE @sp_Date DATETIME SET @sp_Date = DateAdd(m, -6, GETDATE()) SELECT DISTINCT pat.PublicationID FROM PubAdvTransData AS pat INNER JOIN PubAdvertiser AS pa ON pat.AdvTransID = pa.AdvTransID WHERE (pat.LastAdDate > @sp_Date) AND (pa.AdvertiserID = 12345))
问题是@sp_Date值似乎被忽略了,我想知道为什么吗?我定义或使用不正确吗?
您的语法很好,它将返回LastAdDate过去6个月内的行;
LastAdDate
select cast('01-jan-1970' as datetime) as LastAdDate into #PubAdvTransData union select GETDATE() union select NULL union select '01-feb-2010' DECLARE @sp_Date DATETIME = DateAdd(m, -6, GETDATE()) SELECT * FROM #PubAdvTransData pat WHERE (pat.LastAdDate > @sp_Date) >2010-02-01 00:00:00.000 >2010-04-29 21:12:29.920
您确定LastAdDate类型DATETIME吗?
DATETIME