導(dǎo)讀:1建站知識(shí)最近報(bào)表要用到一項(xiàng)功能，需要把數(shù)據(jù)源根據(jù)記錄發(fā)生日期所在的星期序列進(jìn)行分組。因此就寫了兩個(gè)相關(guān)SQL Functi網(wǎng)站seo優(yōu)化個(gè)業(yè)網(wǎng)站建設(shè)公司。

一、給定一個(gè)日期值，求出此日期所在星期的星期一和星期天的日期數(shù)據(jù) 例如給定一個(gè)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(chuàng)建如下:

復(fù)制代碼 代碼如下:

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,DATEAD網(wǎng)站seo優(yōu)化課程D(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:

復(fù)制代碼 代碼如下:

SELECT * from My_OneDay_GetWeekFirstAndEndDay('2010-09-01')

二、以上面單個(gè)日期搜索為基礎(chǔ)，由用戶輸入建設(shè)網(wǎng)站兩個(gè)參數(shù)，一個(gè)是開始日期，一個(gè)結(jié)束日期，根據(jù)這兩個(gè)參數(shù)，求出在此時(shí)期段內(nèi)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(jié)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(chuàng)建如下:

復(fù)制代碼 代碼如下:

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 FirstD網(wǎng)站建設(shè)教程Ay) 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:

復(fù)制代碼 代碼如下:

SELECT * from My_Range_GetWeekFirstAndEndDays('2011-09-01','2011-10-06')

相關(guān)網(wǎng)站seo優(yōu)化個(gè)業(yè)網(wǎng)站建設(shè)公司。

關(guān)鍵詞標(biāo)簽: SQL 日期 星期