您好,登錄后才能下訂單哦!
這期內容當中小編將會給大家帶來有關SQL中如何判斷給定日期值,文章內容豐富且以專業的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
一、給定一個日期值,求出此日期所在星期的星期一和星期天的日期數據
例如給定一個日期2010-09-01,求出它所在星期的星期一是2010-08-30,星期天是2010-09-05
Function創建如下:
USE [MSSQL]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[My_OneDay_GetWeekFirstAndEndDay](@tmpDate DATETIME)
RETURNS @tmpTable TABLE(FirstDay DATETIME , EndDay DATETIME)
AS
BEGIN
INSERT INTO @tmpTable
SELECT a.FirstDay,b.EndDay FROM (
SELECT 1 AS ID,DATEADD(wk, DATEDIFF(wk,0,@tmpDate), 0) AS FirstDAy
) a
LEFT JOIN (
SELECT 1 AS ID,DATEADD(wk, DATEDIFF(wk,0,@tmpDate), 6) AS EndDay
) b
ON a.ID = b.ID
RETURN
END
Function測試:
SELECT * from My_OneDay_GetWeekFirstAndEndDay('2010-09-01')
二、以上面單個日期搜索為基礎,由用戶輸入兩個參數,一個是開始日期,一個結束日期,根據這兩個參數,求出在此時期段內的所有星期的星期一和星期天的日期表并排序。
例如開始日期是2011-09-01,結束日期是2011-10-06,我們就可以得到此星期表如下:
WeekOrder FirstDay EndDay
1 2011-08-29 00:00:00.000 2011-09-04 00:00:00.000
2 2011-09-05 00:00:00.000 2011-09-11 00:00:00.000
3 2011-09-12 00:00:00.000 2011-09-18 00:00:00.000
4 2011-09-19 00:00:00.000 2011-09-25 00:00:00.000
5 2011-09-26 00:00:00.000 2011-10-02 00:00:00.000
6 2011-10-03 00:00:00.000 2011-10-09 00:00:00.000
Function創建如下:
USE [MSSQL]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[MY_Range_GetWeekFirstAndEndDays](@tmpDateSTART DATETIME,@tmpDateEND DATETIME)
RETURNS @tmpTable TABLE(WeekOrder INT,FirstDay DATETIME , EndDay DATETIME)
AS
BEGIN
DECLARE @tmpDate DATETIME
DECLARE @index INT
SET @tmpDate=@tmpDateSTART
SET @index=1
WHILE @tmpDate <=@tmpDateEND
BEGIN
INSERT INTO @tmpTable
SELECT @index,a.FirstDay,b.EndDay FROM (
SELECT 1 AS ID,DATEADD(wk, DATEDIFF(wk,0,@tmpDate), 0) AS FirstDAy) a
LEFT JOIN (
SELECT 1 AS ID,DATEADD(wk, DATEDIFF(wk,0,@tmpDate), 6) AS EndDay) b
ON a.ID = b.ID
SET @tmpDate=DATEADD(DAY,7,@tmpDate)
SET @index=@index+1
END
RETURN
END
Function測試:
SELECT * from My_Range_GetWeekFirstAndEndDays('2011-09-01','2011-10-06')
上述就是小編為大家分享的SQL中如何判斷給定日期值了,如果剛好有類似的疑惑,不妨參照上述分析進行理解。如果想知道更多相關知識,歡迎關注億速云行業資訊頻道。
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。