2.5.2 生成日期列表的函数.sql

 if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[f_getdate]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[f_getdate]
GO

/*--生成日期列表
 
 生成指定年份的工作日/休息日列表

--邹建 2003.12(引用请保留此信息)--*/

/*--调用示例

 --查询 2003 年的工作日列表
 SELECT * FROM dbo.f_getdate(2003,0)
 
 --查询 2003 年的休息日列表
 SELECT * FROM dbo.f_getdate(2003,1)

 --查询 2003 年全部日期列表
 SELECT * FROM dbo.f_getdate(2003,NULL)
--*/
CREATE FUNCTION dbo.f_getdate(
@year int,    --要查询的年份
@bz bit       --@bz=0 查询工作日,@bz=1 查询休息日,@bz IS NULL 查询全部日期
)RETURNS @re TABLE(id int identity(1,1),Date datetime,Weekday nvarchar(3))
AS
BEGIN
 DECLARE @tb TABLE(ID int IDENTITY(0,1),Date datetime)
 INSERT INTO @tb(Date) SELECT TOP 366 DATEADD(Year,@YEAR-1900,'1900-1-1')
 FROM sysobjects a ,sysobjects b
 UPDATE @tb SET Date=DATEADD(DAY,id,Date)
 DELETE FROM @tb WHERE Date>DATEADD(Year,@YEAR-1900,'1900-12-31')
 
 IF @bz=0
  INSERT INTO @re(Date,Weekday)
  SELECT Date,DATENAME(Weekday,Date)
  FROM @tb
  WHERE (DATEPART(Weekday,Date)+@@DATEFIRST-1)%7 BETWEEN 1 AND 5
 ELSE IF @bz=1
  INSERT INTO @re(Date,Weekday)
  SELECT Date,DATENAME(Weekday,Date)
  FROM @tb
  WHERE (DATEPART(Weekday,Date)+@@DATEFIRST-1)%7 IN (0,6)
 ELSE
  INSERT INTO @re(Date,Weekday)
  SELECT Date,DATENAME(Weekday,Date)
  FROM @tb
 
 RETURN
END
GO

/*====================================================================*/

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[f_getdate]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[f_getdate]
GO

/*--生成列表

 生成指定日期段的日期列表

--邹建 2005.03(引用请保留此信息)--*/

/*--调用示例

 --查询工作日
 SELECT * FROM dbo.f_getdate('2005-1-3','2005-4-5',0)
 
 --查询休息日
 SELECT * FROM dbo.f_getdate('2005-1-3','2005-4-5',1)
 
 --查询全部日期
 SELECT * FROM dbo.f_getdate('2005-1-3','2005-4-5',NULL)
--*/

CREATE FUNCTION dbo.f_getdate(
@begin_date Datetime,  --要查询的开始日期
@end_date Datetime,    --要查询的结束日期
@bz bit                --@bz=0 查询工作日,@bz=1 查询休息日,@bz IS NULL 查询全部日期
)RETURNS @re TABLE(id int identity(1,1),Date datetime,Weekday nvarchar(3))
AS
BEGIN
 DECLARE @tb TABLE(ID int IDENTITY(0,1),a bit)
 INSERT INTO @tb(a) SELECT TOP 366 0
 FROM sysobjects a ,sysobjects b
 
 IF @bz=0
  WHILE @begin_date< =@end_date
  BEGIN
   INSERT INTO @re(Date,Weekday)
   SELECT Date,DATENAME(Weekday,Date)
   FROM(
    SELECT Date=DATEADD(Day,ID,@begin_date)
    FROM @tb   
   )a WHERE Date< =@end_date
    AND (DATEPART(Weekday,Date)+@@DATEFIRST-1)%7 BETWEEN 1 AND 5
   SET @begin_date=DATEADD(Day,366,@begin_date)
  END
 ELSE IF @bz=1
  WHILE @begin_date< =@end_date
  BEGIN
   INSERT INTO @re(Date,Weekday)
   SELECT Date,DATENAME(Weekday,Date)
   FROM(
    SELECT Date=DATEADD(Day,ID,@begin_date)
    FROM @tb   
   )a WHERE Date< =@end_date
    AND (DATEPART(Weekday,Date)+@@DATEFIRST-1)%7 in(0,6)
   SET @begin_date=DATEADD(Day,366,@begin_date)
  END
 ELSE
  WHILE @begin_date< =@end_date
  BEGIN
   INSERT INTO @re(Date,Weekday)
   SELECT Date,DATENAME(Weekday,Date)
   FROM(
    SELECT Date=DATEADD(Day,ID,@begin_date)
    FROM @tb   
   )a WHERE Date< =@end_date
   SET @begin_date=DATEADD(Day,366,@begin_date)
  END

 RETURN
END
GO