SELECT dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0)) 16、本年的最后一天 SELECT dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate())+1, 0)) 17、本月的第一个星期一 select DATEADD(wk, DATEDIFF(wk,0,dateadd(dd,6-date
The DATEDIFF() function calculates the difference between two date or timestamp values and returns the result in a specified unit, such as days, months, or years. DATEDIFF Syntax Across SQL Dialects The syntax for DATEDIFF() varies across SQL dialects. Below are examples for commonly used datab...
G. Specify ranking functions for startdate This example uses a ranking function as an argument forstartdate. SQL USEAdventureWorks2022; GOSELECTp.FirstName, p.LastName,DATEDIFF(day, ROW_NUMBER()OVER(ORDERBYa.PostalCode), SYSDATETIME())AS'Row Number'FROMSales.SalesPersonASsINNERJOINPerson.PersonAS...
Select*FromTableNameWhereDateDiff(dd, GetDate(), DateTimCol) = 1 --最近七天 Select*FromTableNameWhereDateDiff(dd, DateTimCol, GetDate()) <= 7 --随后七天 Select*FromTableNameWhereDateDiff(dd, GetDate(), DateTimCol) <= 7 --上周 Select*FromTableNameWhereDateDiff(wk, DateTimCol, GetDate...
如果startdate和enddate都只分配一个时间值,并且datepart不是时间日期部分,DATEDIFF则0返回 。 DATEDIFF使用 startdate 或 enddate 的时区偏移部分来计算返回值。 由于smalldatetime仅对分钟准确,因此当 startdate或enddate 具有smalldatetime值时,始终在返回值中设置为0秒和毫秒。
DATEDIFF (Transact-SQL) 返回指定的 startdate 和 enddate 之间所跨的指定 datepart 边界的计数(带符号的整数)。 有关所有 Transact-SQL 日期和时间数据类型及函数的概述,请参阅日期和时间函数 (Transact-SQL)。有关日期和时间数据类型及函数共有的信息和示例,请参阅使用日期和时间数据。 Transact-SQL 语法约定 ...
DATEDIFF can be used in the select list, WHERE, HAVING, GROUP BY and ORDER BY clauses. In SQL Server 2008, DATEDIFF implicitly casts string literals as datetime2 types. When using DATEDIFF with DATEADD, avoid implicit casts of string literals. For more information, seeDATEADD (Transact-SQL)...
G. Specifying ranking functions for startdate The following example uses a ranking function as an argument for startdate. Copy USE AdventureWorks2012; GO SELECT p.FirstName, p.LastName ,DATEDIFF(day,ROW_NUMBER() OVER (ORDER BY a.PostalCode),SYSDATETIME()) AS 'Row Number' FROM Sales.SalesP...
SELECT DATEDIFF(day, signup_date, GETDATE()) AS days_since_signup FROM users; Copy In this example, we calculate the difference between the signup date and the current date (using theGETDATE()function) in days. Example 2: Getting the Date Difference Between Two Columns ...
結果集如下所示。 複製 2017 years, 11 months, 11 days, 7 hours, 8 minutes and 1.123 seconds 請參閱DATEDIFF (Transact-SQL)中更緊密相關的範例。 另請參閱 CAST 和 CONVERT (Transact-SQL) DATEDIFF (Transact-SQL)