步骤1:获取当前日期 -- 获取当前日期DECLARE@CurrentDateDATESET@CurrentDate=GETDATE() 1. 2. 3. 代码说明: DECLARE @CurrentDate DATE: 声明一个变量@CurrentDate用于存储当前日期 GETDATE(): 获取当前日期和时间 步骤2:计算6个月前的日期 -- 计算6个月前的日期DECLARE@SixMonthsAgoDATESET@SixMonthsAgo=DAT...
DATEADD函数的结构为DATEADD(datepart, number, date),其中datepart为时间部分(比如月、天等),number为要添加的时间数,date为要计算的日期。我们将number设置为-6表示向前推算6个月。 -- 计算6个月前的日期DECLARE@sixMonthsAgoDATETIME;SET@sixMonthsAgo=DATEADD(MONTH,-6,@currentDate);SELECT@sixMonthsAgoASSixMon...
sql SELECT DATEADD(MONTH, -6, GETDATE()) AS SixMonthsAgo; 这条SQL语句会返回当前日期的前六个月日期。例如,如果当前日期是2023年10月1日,那么查询结果将会是2023年4月1日。 请注意,上述SQL语句是基于SQL Server的。如果你使用的是其他数据库系统(如MySQL或PostgreSQL),日期函数可能会有所不同,但基本原理...
6 months, based on matching fact */ INNER JOIN DimProduct FOR SYSTEM_TIME BETWEEN @sixMonthsAgo AND @now AS DimProduct_History ON DimProduct_History.ProductId = F.ProductId AND F.FactDate BETWEEN DimProduct_History.ValidFrom AND DimProduct_History.ValidTo WHERE F.FactDate BETWEEN @sixMont...
6 months ago by John OtienoDate and time operations are as common as querying the data in an SQL table. Especially when dealing with date related calculations, you are going to come across instances where you need to add the month values from a given date. Take for example where you need...
6 months, based on matching fact */INNERJOINDimProductFORSYSTEM_TIMEBETWEEN@sixMonthsAgoAND@nowASDimProduct_HistoryONDimProduct_History.ProductId = F.ProductIdANDF.FactDateBETWEENDimProduct_History.ValidFromANDDimProduct_History.ValidToWHEREF.FactDateBETWEEN@sixMonthsAgoAND@nowGROUPBYDimProduct_History....
6 months, based on matching fact */ INNER JOIN DimProduct FOR SYSTEM_TIME BETWEEN @sixMonthsAgo AND @now AS DimProduct_History ON DimProduct_History.ProductId = F.ProductId AND F.FactDate BETWEEN DimProduct_History.ValidFrom AND DimProduct_History.ValidTo WHERE F.FactDate BETWEEN @sixMonths...
SELECT CONVERT(varchar(6), DATEADD(MONTH, -1, GETDATE()), 112) AS LastMonth; 解释: DATEADD函数用于在日期上添加或减去指定的时间间隔,这里使用MONTH表示减去一个月。 GETDATE函数用于获取当前日期和时间。 CONVERT函数用于将日期转换为指定的格式,这里使用112表示将日期转换为YYYYMM格式的字符串。
@RCINT=1;WHILE(@RC>0)BEGINSELECTTOP(1000)@NextBatchMax=DateKeyFROMdbo.FactOnlineSalesWHEREDateKey>@LargestKeyProcessedANDCustomerKey=19036ORDERBYDateKeyASC;DELETEdbo.FactOnlineSalesWHERECustomerKey=19036ANDDateKey>@LargestKeyProcessedANDDateKey<=@NextBatchMax;SET@RC=@@ROWCOUNT;SET@LargestKeyProcessed=...
<= 1 这周 SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段...