1、建一表，放初始化資料

因為農歷的日期，是由天文學家推算出來的，到現在只有到2049年的，以后的有了還可以加入！ CREATE TABLE SolarData ( yearId int not null, data char(7) not null, dataInt int not null )

2、插入數據

INSERT INTO SolarData SELECT 1900,'0x04bd8',19416 UNION ALL SELECT 1901,'0x04ae0',19168 UNION ALL SELECT 1902,'0x0a570',42352 UNION ALL SELECT 1903,'0x054d5',21717 UNION ALL SELECT 1904,'0x0d260',53856 UNION ALL SELECT 1905,'0x0d950',55632 UNION ALL SELECT 1906,'0x16554',91476 UNION ALL SELECT 1907,'0x056a0',22176 UNION ALL SELECT 1908,'0x09ad0',39632 UNION ALL SELECT 1909,'0x055d2',21970 UNION ALL SELECT 1910,'0x04ae0',19168 UNION ALL SELECT 1911,'0x0a5b6',42422 UNION ALL SELECT 1912,'0x0a4d0',42192 UNION ALL SELECT 1913,'0x0d250',53840 UNION ALL SELECT 1914,'0x1d255',119381 UNION ALL SELECT 1915,'0x0b540',46400 UNION ALL SELECT 1916,'0x0d6a0',54944 UNION ALL SELECT 1917,'0x0ada2',44450 UNION ALL SELECT 1918,'0x095b0',38320 UNION ALL SELECT 1919,'0x14977',84343 UNION ALL SELECT 1920,'0x04970',18800 UNION ALL SELECT 1921,'0x0a4b0',42160 UNION ALL SELECT 1922,'0x0b4b5',46261 UNION ALL SELECT 1923,'0x06a50',27216 UNION ALL SELECT 1924,'0x06d40',27968 UNION ALL SELECT 1925,'0x1ab54',109396 UNION ALL SELECT 1926,'0x02b60',11104 UNION ALL SELECT 1927,'0x09570',38256 UNION ALL SELECT 1928,'0x052f2',21234 UNION ALL SELECT 1929,'0x04970',18800 UNION ALL SELECT 1930,'0x06566',25958 UNION ALL SELECT 1931,'0x0d4a0',54432 UNION ALL SELECT 1932,'0x0ea50',59984 UNION ALL SELECT 1933,'0x06e95',28309 UNION ALL SELECT 1934,'0x05ad0',23248 UNION ALL SELECT 1935,'0x02b60',11104 UNION ALL SELECT 1936,'0x186e3',100067 UNION ALL SELECT 1937,'0x092e0',37600 UNION ALL SELECT 1938,'0x1c8d7',116951 UNION ALL SELECT 1939,'0x0c950',51536 UNION ALL SELECT 1940,'0x0d4a0',54432 UNION ALL SELECT 1941,'0x1d8a6',120998 UNION ALL SELECT 1942,'0x0b550',46416 UNION ALL SELECT 1943,'0x056a0',22176 UNION ALL SELECT 1944,'0x1a5b4',107956 UNION ALL SELECT 1945,'0x025d0',9680 UNION ALL SELECT 1946,'0x092d0',37584 UNION ALL SELECT 1947,'0x0d2b2',53938 UNION ALL SELECT 1948,'0x0a950',43344 UNION ALL SELECT 1949,'0x0b557',46423 UNION ALL SELECT 1950,'0x06ca0',27808 UNION ALL SELECT 1951,'0x0b550',46416 UNION ALL SELECT 1952,'0x15355',86869 UNION ALL SELECT 1953,'0x04da0',19872 UNION ALL SELECT 1954,'0x0a5d0',42448 UNION ALL SELECT 1955,'0x14573',83315 UNION ALL SELECT 1956,'0x052d0',21200 UNION ALL SELECT 1957,'0x0a9a8',43432 UNION ALL SELECT 1958,'0x0e950',59728 UNION ALL SELECT 1959,'0x06aa0',27296 UNION ALL SELECT 1960,'0x0aea6',44710 UNION ALL SELECT 1961,'0x0ab50',43856 UNION ALL SELECT 1962,'0x04b60',19296 UNION ALL SELECT 1963,'0x0aae4',43748 UNION ALL SELECT 1964,'0x0a570',42352 UNION ALL SELECT 1965,'0x05260',21088 UNION ALL SELECT 1966,'0x0f263',62051 UNION ALL SELECT 1967,'0x0d950',55632 UNION ALL SELECT 1968,'0x05b57',23383 UNION ALL SELECT 1969,'0x056a0',22176 UNION ALL SELECT 1970,'0x096d0',38608 UNION ALL SELECT 1971,'0x04dd5',19925 UNION ALL SELECT 1972,'0x04ad0',19152 UNION ALL SELECT 1973,'0x0a4d0',42192 UNION ALL SELECT 1974,'0x0d4d4',54484 UNION ALL SELECT 1975,'0x0d250',53840 UNION ALL SELECT 1976,'0x0d558',54616 UNION ALL SELECT 1977,'0x0b540',46400 UNION ALL SELECT 1978,'0x0b5a0',46496 UNION ALL SELECT 1979,'0x195a6',103846 UNION ALL SELECT 1980,'0x095b0',38320 UNION ALL SELECT 1981,'0x049b0',18864 UNION ALL SELECT 1982,'0x0a974',43380 UNION ALL SELECT 1983,'0x0a4b0',42160 UNION ALL SELECT 1984,'0x0b27a',45690 UNION ALL SELECT 1985,'0x06a50',27216 UNION ALL SELECT 1986,'0x06d40',27968 UNION ALL SELECT 1987,'0x0af46',44870 UNION ALL SELECT 1988,'0x0ab60',43872 UNION ALL SELECT 1989,'0x09570',38256 UNION ALL SELECT 1990,'0x04af5',19189 UNION ALL SELECT 1991,'0x04970',18800 UNION ALL SELECT 1992,'0x064b0',25776 UNION ALL SELECT 1993,'0x074a3',29859 UNION ALL SELECT 1994,'0x0ea50',59984 UNION ALL SELECT 1995,'0x06b58',27480 UNION ALL SELECT 1996,'0x055c0',21952 UNION ALL SELECT 1997,'0x0ab60',43872 UNION ALL SELECT 1998,'0x096d5',38613 UNION ALL SELECT 1999,'0x092e0',37600 UNION ALL SELECT 2000,'0x0c960',51552 UNION ALL SELECT 2001,'0x0d954',55636 UNION ALL SELECT 2002,'0x0d4a0',54432 UNION ALL SELECT 2003,'0x0da50',55888 UNION ALL SELECT 2004,'0x07552',30034 UNION ALL SELECT 2005,'0x056a0',22176 UNION ALL SELECT 2006,'0x0abb7',43959 UNION ALL SELECT 2007,'0x025d0',9680 UNION ALL SELECT 2008,'0x092d0',37584 UNION ALL SELECT 2009,'0x0cab5',51893 UNION ALL SELECT 2010,'0x0a950',43344 UNION ALL SELECT 2011,'0x0b4a0',46240 UNION ALL SELECT 2012,'0x0baa4',47780 UNION ALL SELECT 2013,'0x0ad50',44368 UNION ALL SELECT 2014,'0x055d9',21977 UNION ALL SELECT 2015,'0x04ba0',19360 UNION ALL SELECT 2016,'0x0a5b0',42416 UNION ALL SELECT 2017,'0x15176',86390 UNION ALL SELECT 2018,'0x052b0',21168 UNION ALL SELECT 2019,'0x0a930',43312 UNION ALL SELECT 2020,'0x07954',31060 UNION ALL SELECT 2021,'0x06aa0',27296 UNION ALL SELECT 2022,'0x0ad50',44368 UNION ALL SELECT 2023,'0x05b52',23378 UNION ALL SELECT 2024,'0x04b60',19296 UNION ALL SELECT 2025,'0x0a6e6',42726 UNION ALL SELECT 2026,'0x0a4e0',42208 UNION ALL SELECT 2027,'0x0d260',53856 UNION ALL SELECT 2028,'0x0ea65',60005 UNION ALL SELECT 2029,'0x0d530',54576 UNION ALL SELECT 2030,'0x05aa0',23200 UNION ALL SELECT 2031,'0x076a3',30371 UNION ALL SELECT 2032,'0x096d0',38608 UNION ALL SELECT 2033,'0x04bd7',19415 UNION ALL SELECT 2034,'0x04ad0',19152 UNION ALL SELECT 2035,'0x0a4d0',42192 UNION ALL SELECT 2036,'0x1d0b6',118966 UNION ALL SELECT 2037,'0x0d250',53840 UNION ALL SELECT 2038,'0x0d520',54560 UNION ALL SELECT 2039,'0x0dd45',56645 UNION ALL SELECT 2040,'0x0b5a0',46496 UNION ALL SELECT 2041,'0x056d0',22224 UNION ALL SELECT 2042,'0x055b2',21938 UNION ALL SELECT 2043,'0x049b0',18864 UNION ALL SELECT 2044,'0x0a577',42359 UNION ALL SELECT 2045,'0x0a4b0',42160 UNION ALL SELECT 2046,'0x0aa50',43600 UNION ALL SELECT 2047,'0x1b255',111189 UNION ALL SELECT 2048,'0x06d20',27936 UNION ALL SELECT 2049,'0x0ada0',44448

3、創建函數

該函數用來讀取農歷日期

CREATE FUNCTION fn_GetLunar(@solarDay DATETIME) RETURNS datetime

AS BEGIN DECLARE @solData int DECLARE @offset int DECLARE @iLunar int DECLARE @i INT DECLARE @j INT DECLARE @yDays int DECLARE @mDays int DECLARE @mLeap int DECLARE @mLeapNum int DECLARE @bLeap smallint DECLARE @temp int

DECLARE @YEAR INT DECLARE @MONTH INT DECLARE @DAY INT

DECLARE @OUTPUTDATE DATETIME

--保證傳進來的日期是不帶時間SET @solarDay=cast(@solarDay AS char(10)) SET @offset=CAST(@solarDay-'1900-01-30' AS INT)

--確定農歷年開始SET @i=1900 --SET @offset=@solDataWHILE @i<2050 AND @offset>0 BEGIN SET @yDays=348 SET @mLeapNum=0 SELECT @iLunar=dataInt FROM SolarData WHERE yearId=@i

--傳回農歷年的總天數SET @j=32768 WHILE @j>8 BEGIN IF @iLunar & @j >0 SET @yDays=@yDays+1 SET @j=@j/2 END

--傳回農歷年閏哪個月 1-12 , 沒閏傳回 0SET @mLeap = @iLunar & 15

--傳回農歷年閏月的天數 ,加在年的總天數上IF @mLeap > 0 BEGIN IF @iLunar & 65536 > 0 SET @mLeapNum=30 ELSE SET @mLeapNum=29

SET @yDays=@yDays+@mLeapNum END

SET @offset=@offset-@yDays SET @i=@i+1 END

IF @offset <= 0 BEGIN SET @offset=@offset+@yDays SET @i=@i-1 END --確定農歷年結束SET @YEAR=@i

--確定農歷月開始SET @i = 1 SELECT @iLunar=dataInt FROM SolarData WHERE yearId=@YEAR

--判斷那個月是潤月SET @mLeap = @iLunar & 15 SET @bLeap = 0

WHILE @i < 13 AND @offset > 0 BEGIN --判斷潤月SET @mDays=0 IF (@mLeap > 0 AND @i = (@mLeap+1) AND @bLeap=0) BEGIN --是潤月SET @i=@i-1 SET @bLeap=1 --傳回農歷年閏月的天數IF @iLunar & 65536 > 0 SET @mDays = 30 ELSE SET @mDays = 29 END ELSE --不是潤月BEGIN SET @j=1 SET @temp = 65536 WHILE @j<=@i BEGIN SET @temp=@temp/2 SET @j=@j+1 END

IF @iLunar & @temp > 0 SET @mDays = 30 ELSE SET @mDays = 29 END

--解除閏月 IF @bLeap=1 AND @i= (@mLeap+1) SET @bLeap=0

SET @offset=@offset-@mDays SET @i=@i+1 END

IF @offset <= 0 BEGIN SET @offset=@offset+@mDays SET @i=@i-1 END

--確定農歷月結束SET @MONTH=@i

--確定農歷日結束 SET @DAY=@offset

SET @OUTPUTDATE=CAST((CAST(@YEAR AS VARCHAR(4))+'-'+CAST(@MONTH AS VARCHAR(2))+'-'+CAST(@DAY AS VARCHAR(2))) AS DATETIME) RETURN @OUTPUTDATE END

4、調用方法

select dbo.fn_GetLunar(getdate()) 或 select dbo.fn_GetLunar('2004-4-13')