1.建立一个数据库表结构(HOLIDAY)保存设定好的节假日，包括三个字段ID,DATE,DESCRIPTION

2.建立存储过程dateArithmetic：

--计算节假日
alter function dateArithmetic( 
	@stratDate   datetime, --开始时间
	@endDate   datetime --结束时间
)
returns int 
as 
begin 
	DECLARE @jqday varchar(20)
	DECLARE @days int
	DECLARE @weekday varchar(20)
	
	--获取总天数
	set @days=DATEDIFF(day,@stratDate,@endDate)  
	--set language N'Simplified Chinese'
	--select @jqday=count(SH00) from HOLIDAY where sh01 between @stratDate and @endDate
	select @jqday=count(SH00) from HOLIDAY where sh01 >= @stratDate and sh01<=@endDate
	while @stratDate<=@endDate
	begin
		
		--设为简体中文
		
		select @weekday=datename(weekday,@stratDate)
		
		if @weekday='星期六' or @weekday='星期日'
			set @jqday=@jqday+1

		set @stratDate=dateadd(day,1,@stratDate)
	end
	
	set @days=@days-@jqday
	--print @weekday
	return(@days)
end

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3.调取存储过程：select dbo.dateArithmetic(开始时间,结束时间)

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