sql server 生成日期列表的函数的例子

发布时间:2020-04-03编辑:脚本学堂
sql server 生成日期列表的函数的例子,供大家学习参考。
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[f_getdate]') a

sql server 生成日期列表的函数的例子,供大家学习参考。
 

复制代码 代码如下:
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

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