sql server函数介绍-日期类

9、生成日期列表的函数

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