SQL How to convert roman number to numeral vice versa - mysql

Question

I would like to convert substring in roman to numeral, vice versa.
The input data would be some kind like this:
Input Output
Satu I Satu 1
Dua II Dua 2
Tiga Iii Tiga 3
empat Iv empat 4
lima v lima 5
enam VI enam 6
Tujuh 7 Tujuh VII
delapan 8 Delapan VIII
Sembilan belas Ix Sembilan belas 19
dua puluh xx dua puluh 20
Dua Satu xxi Dua Satu 21
No numeral No numeral
No roman No roman
Roman substring has inconsistent format (uppercase/lowercase/title case)
Is there a simple way to do it?
Or else (second questions), how to get the last substring from string (I, II, Iii, Iv, v, VI, 7, 8, Ix, xx, xxi) ?
I am using MySQL.
Thanks in advance.

Answer 1

If you find to find the last substring , do this:
SELECT REVERSE(LEFT(REVERSE(INPUT), LOCATE(' ',REVERSE(INPUT))));
I tested it with one of your values: Check here

Answer 2

Try creating a temporary table where it Convert Suffix or Roman Numerals to numbers.
INSERT INTO #tmpSuffixName(
sufCode,
sufLetter)
VALUES
('00',' '),('01','Sr.'),('02','Jr.'),('03','I'),('04','II'),
('05','III'),('06','IV'),('07','V'),('08','VI'),('09','VII'),
('10','VIII'),('11','IX'),('12','X'),('13','Sr. I'),('14','Sr. II'),
('15','Sr. III'),('16','Sr. IV'),('17','Sr. V'),('18','Sr. VI'),
('19','Sr. VII'),('20','Sr. VIII'),('21','Sr. IX'),('22','Sr. X'),
('23','Jr. I'),('24','Jr. II'),('25','Jr. III'),('26','Jr. IV'),
('27','Jr. V'),('28','Jr. VI'),('29','Jr. VII'),('30','Jr. VIII'),
('31','Jr. IX'),('32','Jr. X')
And you can execute a query like this:
SELECT
#mstrSuffix = sufCode
FROM #tmpCustomer
INNER JOIN #tmpSuffixName
ON ISNULL(tmpSuffixName, ' ') = sufLetter
WHERE ID = #GetID

Answer 3

CREATE FUNCTION dbo.uf_NumberToRoman(#NUMBER INT)
RETURNS VARCHAR(128)
AS
BEGIN
IF NOT #NUMBER BETWEEN 1 AND 3999 RETURN NULL
DECLARE #ones INT = #NUMBER, #fives INT, #tens INT, #fifties INT, #hundreds INT, #fivehundreds INT, #thousands INT
SET #thousands = #ones / 1000
SET #ones = #ones % 1000
SET #fivehundreds = #ones / 500
SET #ones = #ones % 500
SET #hundreds = #ones / 100
SET #ones = #ones % 100
SET #fifties = #ones / 50
SET #ones = #ones % 50
SET #tens = #ones / 10
SET #ones = #ones % 10
SET #fives = #ones / 5
SET #ones = #ones % 5
RETURN replicate('M', #thousands)
+ iif(#hundreds = 4, iif(#fivehundreds = 1, 'CM', 'CD'), replicate('D', #fivehundreds) + replicate('C', #hundreds))
+ iif(#tens = 4, iif(#fifties = 1, 'XC', 'XL'), replicate('L', #fifties) + replicate('X', #tens))
+ iif(#ones = 4, iif(#fives = 1, 'IX', 'IV'), replicate('V', #fives) + replicate('I', #ones))
END
go
CREATE FUNCTION dbo.uf_RomanToNumberHelper(#roman VARCHAR(128), #len INT)
RETURNS INT
AS
BEGIN
SET #roman = RIGHT(#roman, #len)
DECLARE #NUMBER INT
IF #len = 0 SET #NUMBER = 0
ELSE IF #roman LIKE 'M%' SET #NUMBER = 1000 + dbo.uf_RomanToNumberHelper(#roman, #len - 1)
ELSE IF #roman LIKE 'CM%' SET #NUMBER = 900 + dbo.uf_RomanToNumberHelper(#roman, #len - 2)
ELSE IF #roman LIKE 'D%' SET #NUMBER = 500 + dbo.uf_RomanToNumberHelper(#roman, #len - 1)
ELSE IF #roman LIKE 'CD%' SET #NUMBER = 400 + dbo.uf_RomanToNumberHelper(#roman, #len - 2)
ELSE IF #roman LIKE 'C%' SET #NUMBER = 100 + dbo.uf_RomanToNumberHelper(#roman, #len - 1)
ELSE IF #roman LIKE 'XC%' SET #NUMBER = 90 + dbo.uf_RomanToNumberHelper(#roman, #len - 2)
ELSE IF #roman LIKE 'L%' SET #NUMBER = 50 + dbo.uf_RomanToNumberHelper(#roman, #len - 1)
ELSE IF #roman LIKE 'XL%' SET #NUMBER = 40 + dbo.uf_RomanToNumberHelper(#roman, #len - 2)
ELSE IF #roman LIKE 'X%' SET #NUMBER = 10 + dbo.uf_RomanToNumberHelper(#roman, #len - 1)
ELSE IF #roman LIKE 'IX%' SET #NUMBER = 9 + dbo.uf_RomanToNumberHelper(#roman, #len - 2)
ELSE IF #roman LIKE 'V%' SET #NUMBER = 5 + dbo.uf_RomanToNumberHelper(#roman, #len - 1)
ELSE IF #roman LIKE 'IV%' SET #NUMBER = 4 + dbo.uf_RomanToNumberHelper(#roman, #len - 2)
ELSE IF #roman LIKE 'I%' SET #NUMBER = 1 + dbo.uf_RomanToNumberHelper(#roman, #len - 1)
RETURN #NUMBER
END
go
CREATE FUNCTION dbo.uf_RomanToNumber(#roman VARCHAR(128))
RETURNS INT
AS
BEGIN
DECLARE #len INT = len(#roman)
IF NOT #len BETWEEN 1 AND 30 RETURN NULL
DECLARE #NUMBER INT = dbo.uf_RomanToNumberHelper(#roman, #len)
IF dbo.uf_NumberToRoman(#NUMBER) != #roman RETURN NULL
RETURN #NUMBER
END
go