点上方关注“SQL数据库开发”，

设为“置顶或星标”，第一时间送达干货

之前已经发布过使用存储过程，生存指定年份的日历表《SQL如何制作一张日历维度表》，然后我在文末留了一个思考题：如何将日期对应的农历也加进日历表中？

有不少同学留言该如何解决农历的问题，今天就告诉大家具体操作方法。

农历与世界通用的日历有所区别，是科学家演算出来的，目前为止只有到2049年的，以后的有了还可以加入！

所以我们可以把已经演算出来的具体农历制作成一张表，通过调用当前的日期来返回具体的农历。

创建农历表

CREATE TABLE SolarData
( yearId int not null primary key, data char(7) not null, dataInt int not null
)

插入农历数据

农历数据包含从1900年到2049年的具体数据。

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

（提示：可以左右滑动代码）

计算具体农历

农历的计算有固定的规则，我们通过下面的算法计算出公历日期对应的农历。

注：以下算法来自网络

create function dbo.fn_GetLunar(@solarday datetime)
returns nvarchar(30)
as
begindeclare @soldata intdeclare @offset intdeclare @ilunar intdeclare @i int declare @j intdeclare @ydays int declare @mdays intdeclare @mleap intdeclare @mleap1 intdeclare @mleapnum intdeclare @bleap smallint declare @temp int declare @year nvarchar(10) declare @month nvarchar(10) declare @day nvarchar(10) declare @chinesenum nvarchar(10) declare @outputdate nvarchar(30) set @offset=datediff(day,'1900-01-30',@solarday) --确定农历年开始 set @i=1900 --set @offset=@soldata while @i<2050 and @offset>0begin set @ydays=348 set @mleapnum=0 select @ilunar=dataint from solardata where yearid=@i --传回农历年的总天数 set @j=32768 while @j>8 begin if @ilunar & @j >0 set @ydays=@ydays+1 set @j=@j/2 end --传回农历年闰哪个月1-12 , 没闰传回0 set @mleap = @ilunar & 15--传回农历年闰月的天数,加在年的总天数上 if @mleap > 0 begin if @ilunar & 65536 > 0set @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 --确定农历年结束 set @year=@i --确定农历月开始 set @i = 1 select @ilunar=dataint from solardata where yearid=@year--判断那个月是润月 set @mleap = @ilunar & 15 set @bleap = 0 while @i < 13 and @offset > 0begin --判断润月 set @mdays=0 if (@mleap > 0 and @i = (@mleap+1) and @bleap=0) begin--是润月 set @i=@i-1 set @bleap=1set @mleap1= @mleap --传回农历年闰月的天数 if @ilunar & 65536 > 0 set @mdays = 30 else set @mdays = 29 end else --不是润月 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 = 30else set @mdays = 29 end--解除润月 if @bleap=1 and @i= (@mleap+1) set @bleap=0set @offset=@offset-@mdays set @i=@i+1 end if @offset <= 0 begin set @offset=@offset+@mdays set @i=@i-1 end --确定农历月结束 set @month=@i --确定农历日结束 set @day=ltrim(@offset)--输出日期set @chinesenum=N'〇一二三四五六七八九十' while len(@year)>0select @outputdate=isnull(@outputdate,'')+ substring(@chinesenum,left(@year,1)+1,1), @year=stuff(@year,1,1,'')set @outputdate=@outputdate+N'年'+ case @mleap1 when @month then N'润' else '' endif cast(@month as int)<10set @outputdate=@outputdate+ case @month when 1 then N'正'else substring(@chinesenum,left(@month,1)+1,1)endelse if cast(@month as int)>=10set @outputdate=@outputdate+ case @month when '10' then N'十' when 11 then N'十一'else N'十二' endset @outputdate=@outputdate + N'月'if cast(@day as int)<10set @outputdate=@outputdate + N'初'+ substring(@chinesenum,left(@day,1)+1,1)else if @day between '10' and '19'set @outputdate=@outputdate+ case @day when '10' then N'初十' else N'十'+substring(@chinesenum,right(@day,1)+1,1) endelse if @day between '20' and '29'set @outputdate=@outputdate+ case @day when '20' then N'二十' else N'廿' end+ case @day when '20' then N'' elsesubstring(@chinesenum,right(@day,1)+1,1) endelseset @outputdate=@outputdate+N'三十'return @outputdate
end
GO

测试农历算法

我们创建的是一个农历的函数，当我们将日期传递给这个函数，其就会返回具体的日历了。

SELECT dbo.fn_GetLunar('2021-02-19') Lunar

查看一下返回的结果：

我们去查了一下日历，验证结果是正确的

将农历加入到日历表

已经获得了公历转换成农历的转换函数，我们直接调用该函数即可。修改一下日历表结构（在表CALENDAR_INFO 中添加一个字符串格式的字段Lunar）和存储过程。更新后的存储过程如下：

CREATE PROC PROC_CALENDAR(@YEAR INT )
AS
BEGIN
DECLARE @i INT;
DECLARE @START_DATE VARCHAR(20);
DECLARE @END_DATE VARCHAR(20);
DECLARE @DATE_COUNT INT;
SET @i=0;
--定义一年的开始日期，用CONCAT函数将年份和月份日期拼接起来
SET @START_DATE= CONCAT(@YEAR, '-01-01');
--定义一年的结束日期
SET @END_DATE = CONCAT(@YEAR+1,'-01-01');
--如果表已经存在要新建的日历，则先删除
DELETE FROM CALENDAR_INFO WHERE YEAR = @YEAR;
--计算开始到结束日期一共有多少天，DATEDIFF函数计算日期的间隔天数
SET @DATE_COUNT = DATEDIFF(DAY,@START_DATE,@END_DATE);--建立循环，条件是@i小于一年的天数
WHILE @i < @DATE_COUNT
BEGIN
INSERT INTO CALENDAR_INFO (COUNTRY,CDR_CODE,DATE_NAME,LUNAR,
YEAR,MONTH,WEEK,DAY,CDR_DATE,CREATOR,CREATE_DATE,CREATE_INST)
SELECT
'CN',
'CN01',
--CONVERT函数将@START_DATE转换成指定的格式
CONVERT(CHAR(10),@START_DATE,111) DATE_NAME,
--将公历日期转换为农历
dbo.fn_GetLunar(CONVERT(datetime,@start_date,101)) LUNAR,
--DATENAME获取@START_DATE的年份
CONVERT(CHAR(4),DATENAME(YEAR, @START_DATE)) YEAR,
--DATENAME获取@START_DATE的月份
CONVERT(CHAR(2),DATENAME(MONTH, @START_DATE)) MONTH,
--DATENAME获取@START_DATE的星期
CONVERT(CHAR(6),DATENAME(WEEKDAY, @START_DATE)) WEEK,
--DATENAME获取@START_DATE的日期
CONVERT(CHAR(2),DATENAME(DAY, @START_DATE)) DAY,
CONVERT(CHAR(10),@START_DATE,120) CDR_DATE,
'平凡世界',
GETDATE() CREATE_DATE,
'Lyven'
--插入完成后，对@i进行自加1处理
SET @i=@i+1;
--更新@START_DATE的值，在原来的基础上使用DATEADD函数增加一天
SET @START_DATE=CONVERT(CHAR(10),DATEADD(DAY, 1, @START_DATE),120);
END
END

执行存储过程

EXEC proc_calendar 2019

结果如下：

我们去查了一下日历，验证结果是正确的

日期维度表作用

可能有同学会问，花这么大力气就写了个这个，到底有什么用啊？

既然叫维度表，那肯定是跟维度有关了，有了这个维度表，我们可以通过多维数据集来查看不同日期维度的具体数据，特别是应用在可视化报表开发方面。

下面就是一个比较简单的Power BI报表，这里我们就使用到了日期维度表中的年月。

Power BI效果图

至此，一个包含农历的完整日期维度表就生成了，有兴趣的小伙伴可以用MySQL或Oracle进行改写一下。

参考资料

https://www.cnblogs.com/accumulater/articles/6807248.html

点击右下角「在看」和转发

是对我们最大的支持

最后给大家分享我写的SQL两件套：《SQL基础知识第二版》和《SQL高级知识第二版》的PDF电子版。里面有各个语法的解释、大量的实例讲解和批注等等，非常通俗易懂，方便大家跟着一起来实操。有需要的读者可以下载学习，在下面的公众号「数据前线」(非本号)后台回复关键字：SQL，就行数据前线
后台回复关键字：1024，获取一份精心整理的技术干货
后台回复关键字：进群，带你进入高手如云的交流群。