Sqlserver計算本年度工作日

 --@StartDate 本年度第一天
  --@EndDate   本年度最后一天
  DECLARE @StartDate DATETIME = DATEADD(yy, DATEDIFF(yy, 0, GETDATE()), 0) 
  DECLARE @EndDate DATETIME = DATEADD(ms, -3,
                                      DATEADD(yy,
                                              DATEDIFF(yy, 0, GETDATE()) + 1,
                                              0))  
  IF EXISTS ( SELECT    *
              FROM      tempdb..sysobjects
              WHERE     id = OBJECT_ID('tempdb..#tb_work') ) 
    BEGIN       
        DROP TABLE  #tb_work      
    END       
  CREATE TABLE #tb_work
    (
      RN INT ,
      WorkDate DATE ,--日期
      DeWeek NVARCHAR(10) ,--星期幾
      IsWork NVARCHAR(10)  --是否上班
    )  
  INSERT    INTO #tb_work
            ( RN ,
              WorkDate ,
              DeWeek  
            )
            SELECT  ROW_NUMBER() OVER ( ORDER BY CAST(DATEADD(day, number,
                                                              @StartDate) AS DATE) ) ,
                    CAST(DATEADD(day, number, @StartDate) AS DATE) AS dt ,
                    DATENAME(WEEKDAY,
                             CAST(DATEADD(day, number, @StartDate) AS DATE))
            FROM    master.dbo.spt_values
            WHERE   type = 'P'
                    AND number <= DATEDIFF(day, @StartDate, @EndDate)
                    
            SELECT * FROM #tb_work;

下面根據自己數據庫配置的情況更新表中的“是否上班”的字段

例如我們有個配置表如下：

我們先把配置表里的節假日信息數據填充到臨時表

UPDATE  tw WITH(ROWLOCK)
SET     tw.IsWork = TB.IsShipment
FROM    #tb_work tw WITH ( ROWLOCK )
        INNER JOIN EDI_BaseHoliday tb ON Tw.WorkDate = tb.Holiday

由於我們公司除配置表配置的節假日外，周末是休息的，那么將臨時表中沒更新“是否工作日”的字段進行update

     UPDATE #tb_work
     SET    IsWork = ( CASE WHEN DeWeek = '星期六'
                                 OR DeWeek = '星期日' THEN 'N'
                            ELSE 'Y'
                       END )
     WHERE  ISNULL(IsWork, '') = '' 

這樣本年度的節假日信息就出來了