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本篇內容介紹了“怎么用SQL生成一張帶農歷的日期維度表”的有關知識,在實際案例的操作過程中,不少人都會遇到這樣的困境,接下來就讓小編帶領大家學習一下如何處理這些情況吧!希望大家仔細閱讀,能夠學有所成!
創建農歷表
CREATE TABLE SolarData ( yearId int not null primary key, data char(7) not null, dataInt int not null )
插入農歷數據
農歷數據包含從1900年到2049年的具體數據。
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
(提示:可以左右滑動代碼)
計算具體農歷
農歷的計算有固定的規則,我們通過下面的算法計算出公歷日期對應的農歷。
注:以下算法來自網絡
create function dbo.fn_GetLunar(@solarday datetime) returns nvarchar(30) 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 @mleap1 int declare @mleapnum int declare @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) --確定農歷年開始 set @i=1900 --set @offset=@soldata while @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0 set @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 set @mleap1= @mleap --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 --解除潤月 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=ltrim(@offset) --輸出日期 set @chinesenum=N'〇一二三四五六七八九十' while len(@year)>0 select @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'潤' else '' end if cast(@month as int)<10 set @outputdate=@outputdate + case @month when 1 then N'正' else substring(@chinesenum,left(@month,1)+1,1) end else if cast(@month as int)>=10 set @outputdate=@outputdate + case @month when '10' then N'十' when 11 then N'十一' else N'十二' end set @outputdate=@outputdate + N'月' if cast(@day as int)<10 set @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) end else 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'' else substring(@chinesenum,right(@day,1)+1,1) end else set @outputdate=@outputdate+N'三十' return @outputdate end GO
測試農歷算法
我們創建的是一個農歷的函數,當我們將日期傳遞給這個函數,其就會返回具體的日歷了。
SELECT dbo.fn_GetLunar('2021-02-19') Lunar
查看一下返回的結果:
我們去查了一下日歷,驗證結果是正確的
將農歷加入到日歷表
已經獲得了公歷轉換成農歷的轉換函數,我們直接調用該函數即可。修改一下日歷表結構(在表CALENDAR_INFO 中添加一個字符串格式的字段Lunar)和存儲過程。更新后的存儲過程如下:
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; --定義一年的開始日期,用CONCAT函數將年份和月份日期拼接起來 SET @START_DATE= CONCAT(@YEAR, '-01-01'); --定義一年的結束日期 SET @END_DATE = CONCAT(@YEAR+1,'-01-01'); --如果表已經存在要新建的日歷,則先刪除 DELETE FROM CALENDAR_INFO WHERE YEAR = @YEAR; --計算開始到結束日期一共有多少天,DATEDIFF函數計算日期的間隔天數 SET @DATE_COUNT = DATEDIFF(DAY,@START_DATE,@END_DATE); --建立循環,條件是@i小于一年的天數 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函數將@START_DATE轉換成指定的格式 CONVERT(CHAR(10),@START_DATE,111) DATE_NAME, --將公歷日期轉換為農歷 dbo.fn_GetLunar(CONVERT(datetime,@start_date,101)) LUNAR, --DATENAME獲取@START_DATE的年份 CONVERT(CHAR(4),DATENAME(YEAR, @START_DATE)) YEAR, --DATENAME獲取@START_DATE的月份 CONVERT(CHAR(2),DATENAME(MONTH, @START_DATE)) MONTH, --DATENAME獲取@START_DATE的星期 CONVERT(CHAR(6),DATENAME(WEEKDAY, @START_DATE)) WEEK, --DATENAME獲取@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,對@i進行自加1處理 SET @i=@i+1; --更新@START_DATE的值,在原來的基礎上使用DATEADD函數增加一天 SET @START_DATE=CONVERT(CHAR(10),DATEADD(DAY, 1, @START_DATE),120); END END
執行存儲過程
EXEC proc_calendar 2019
結果如下:
我們去查了一下日歷,驗證結果是正確的
日期維度表作用
可能有同學會問,花這么大力氣就寫了個這個,到底有什么用啊?
既然叫維度表,那肯定是跟維度有關了,有了這個維度表,我們可以通過多維數據集來查看不同日期維度的具體數據,特別是應用在可視化報表開發方面。
下面就是一個比較簡單的Power BI報表,這里我們就使用到了日期維度表中的年月。
Power BI效果圖
至此,一個包含農歷的完整日期維度表就生成了,有興趣的小伙伴可以用MySQL或Oracle進行改寫一下。
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