SELECT DATEADD(week,-1,'2020-09-03')--2020-08-27 00:00:00.000星期四 --加1周 SELECT DATEADD(ww,1,'2020-09-03')--2020-09-10 00:00:00.000星期四 SELECT DATEADD(ww,1,'2020-09-03')--2020-09-10 00:00:00.000星期四 SELECT DATEADD(ww,1,'2020-09-03')--2020-09-10 00:00:00.000...
where the time part is based on an interval of time, such as hours, days, weeks, months, years, etc. The DATEADD function calculates a date by taking an interval of time, and adding it to a date, where the
SELECTDATEADD(month, -(10/2), SYSDATETIME()); Specify ranking functions as number This example uses a ranking function as an argument fornumber. SQL SELECTp.FirstName, p.LastName,DATEADD(day, ROW_NUMBER()OVER(ORDERBYa.PostalCode), SYSDATETIME())AS'Row Number'FROMSales.SalesPersonASsINNERJOI...
For example, the DATEADD function is deterministic because it always returns the same result for any given set of argument values for its three parameters. GETDATE isn't deterministic because it's always invoked with the same argument, but the value it returns changes each time it executes....
are deterministic. Deterministic expressions always return the same result whenever they're evaluated with a specific set of input values. Only deterministic functions can participate in deterministic expressions. For example, theDATEADDfunction is deterministic because it always returns the same result for...
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如需詳細資訊,請參閱<SQL Server 索引架構和設計指南>。如果您直接查詢歷程記錄資料表,請確定篩選條件也是 SARG-able,方式是指定形式為 <period column> { < | > | =, ... } date_condition AT TIME ZONE 'UTC' 的篩選條件。如果您將 AT TIME ZONE 套用到期間資料行,SQL Server 將會執行資料表或索...
For example, the DATEADD function is deterministic because it always returns the same value for the given parameters. GETDATE is nondeterministic because the return values changes for subsequent invocations. It is important that you understand determinism for two reasons. First, an index cannot be ...
❮Previous❮ SQL Server FunctionsNext❯ Example Add one year to a date, then return the date: SELECTDATEADD(year,1,'2017/08/25')ASDateAdd; Try it Yourself » Definition and Usage The DATEADD() function adds a time/date interval to a date and then returns the date. ...
在SQL Server 中,DATEADD 函数用于在指定日期上添加或减去一个指定的时间间隔。它的作用是根据指定单位(年、月、日、小时、分钟等)将指定日期增加或减少一定的数量。DATEADD 函...