根据时间段计算工作日的天数(SqlServer),包含节假日的处理

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创建节假日表:

USE [XHManage]
GO

/****** Object: Table [dbo].[Holiday] Script Date: 02/20/2014 17:51:54 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[Holiday](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](50) NOT NULL,
[BeginDate] [datetime] NOT NULL,
[EndDate] [datetime] NOT NULL,
[AddUser] [nvarchar](50) NOT NULL,
[AddTime] [datetime] NOT NULL,
[Exchange] [bit] NOT NULL,
CONSTRAINT [PK_Holiday] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

ALTER TABLE [dbo].[Holiday] ADD CONSTRAINT [DF_Holiday_AddTime] DEFAULT (getdate()) FOR [AddTime]
GO

ALTER TABLE [dbo].[Holiday] ADD CONSTRAINT [DF_Holiday_Exchange] DEFAULT ((0)) FOR [Exchange]
GO

输入数据(2014年国家节假日设置数据):

INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('元旦','2014-1-1','2014-1-1','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('春节','2014-1-31','2014-2-6','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('清明节','2014-4-5','2014-4-7','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('劳动节','2014-5-1','2014-5-3','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('端午节','2014-6-2','2014-6-2','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('中秋节','2014-9-8','2014-9-8','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('国庆节','2014-10-1','2014-10-7','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('春节调休','2014-1-26','2014-1-26','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('春节调休','2014-2-8','2014-2-8','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('劳动节调休','2014-5-4','2014-5-4','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('国庆节调休','2014-9-28','2014-9-28','admin','2014-2-20',1)
INSERT INTO [XHManage].[dbo].[Holiday]([Name] ,[BeginDate] ,[EndDate] ,[AddUser] ,[AddTime] ,[Exchange])VALUES('国庆节调休','2014-10-11','2014-10-11','admin','2014-2-20',1)

go
create function [dbo].[WorkDay]
(
@beginday   datetime,
@endday   datetime
)
returns int
AS
begin
--set   datefirst   1
declare @caldays   int
declare @id   int
select   @caldays=0

while DATEDIFF(d, @beginday,@endday)>=0
      begin

          if datepart(dw,@beginday)>1 and datepart(dw,@beginday)<7
     begin
   SELECT @id=count(*) from Holiday
   where @beginday between begindate and DATEADD(s,-1,DATEADD(day,1,enddate)) and [Exchange]=0
   if(@id=0)
    select   @caldays=@caldays+1
     end
     else
     begin
     SELECT @id=count(*) from Holiday
     where @beginday between begindate and DATEADD(s,-1,DATEADD(day,1,enddate)) and [Exchange]=1
   if(@id>0)
    select   @caldays=@caldays+1
     end
     select   @beginday=dateadd(day,1,@beginday)
      end
return   @caldays
end

测试:

go
select dbo.[WorkDay]('2014-10-1','2014-10-31')as '工作日'
select dbo.[WorkDay]('2014-9-1','2014-9-30')as '工作日'
select dbo.[WorkDay]('2014-9-30','2014-9-30')as '工作日'
select dbo.[WorkDay]('2014-6-1','2014-6-30')as '工作日'

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