Add some specific value in each digit of number in SQL [closed] - sql-server

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I need the formula for calculating some number
(1) Add 3 in each digit of the particular number
(2) If we get the result after addition in two digits like 10,11,12 etc then consider only last digit
For example if number would be 564843530 then enter code here
New number would be 897176023.

Answer 1

Solution:
DECLARE #number int
SET #number = 564843530;
WITH DigitsTable AS
(
SELECT 0 AS Power10, ABS(#Number) AS Number
UNION ALL
SELECT Power10 + 1, Number / 10
FROM DigitsTable
WHERE Number > 10
)
SELECT SUM((((Number % 10) + 3) % 10) * POWER(10, Power10)) AS NewNumber
FROM DigitsTable
OPTION (MAXRECURSION 0);
Output:
897176863
Explanation:
This answer is based on one recursive CTE which returns each current digit, new digit and multiplier for calculation:
DECLARE #number int
SET #number = 564843530;
WITH DigitsTable AS
(
SELECT 0 AS Power10, ABS(#Number) AS Number
UNION ALL
SELECT Power10 + 1, Number / 10
FROM DigitsTable
WHERE Number > 10
)
SELECT
Power10,
Number % 10 AS Digit,
((Number % 10) + 3) % 10 AS NewDigit,
POWER(10, Power10) AS Multiplier
FROM DigitsTable
OPTION (MAXRECURSION 0);
Output from recursive CTE:
Power10 Digit NewDigit Multiplier
0 0 3 1
1 3 6 10
2 5 8 100
3 3 6 1000
4 4 7 10000
5 8 1 100000
6 4 7 1000000
7 6 9 10000000
8 5 8 100000000

Answer 2

Ty this:
SELECT
(
SELECT RIGHT(SUBSTRING(DS.[number], v.[number] + 1, 1) + 3, 1)
FROM
(
SELECT '564843530'
) DS ([number])
INNER JOIN [master]..spt_values v on v.[number] < LEN(DS.[number])
WHERE V.[type] = 'P'
ORDER BY v.[number]
FOR XML PATH(''), TYPE
).value('.', 'VARCHAR(MAX)');
The algorithm is simple:
split the string to chars (in your case numbers)
add 3 to each number
using RIGHT get the first right char only
concatenate the numbers
This should work on older editions. If you are using SQL Server 2016 you can use functions like STRING_SPLIT and STRING_AGG in SQL Server 2017.
For older version you can look for SQL CLR function in order to write your own functions for splitting and concatenating. For example, in my system I can do:
Check the following link if interested in SQL CLR.

Answer 3

Assume that the example value supplied by the OP is wrong (as, per my comment "Shouldn't 564843530 become 897176863? How is 5 + 3 = (1)0? and 3 + 3 = 2?"), then this is my method, which makes use of NGrams8k:
WITH VTE AS (
SELECT 564843530 AS SomeNumber),
Split AS(
SELECT V.SomeNumber,
NG.token,
NG.position
FROM VTE V
CROSS APPLY dbo.NGrams8k(V.SomeNumber,1) NG)
SELECT SomeNumber AS OldNumber,,
CONVERT(bigint,(SELECT token + 3
FROM Split x
WHERE S.SomeNumber = x.SomeNumber
ORDER BY x.position
FOR XML PATH(''))) AS NewNumber
FROM Split S
GROUP BY S.SomeNumber;

Answer 4

Try this
DECLARE #n int, #inc int;
SELECT #n = 564843530, #inc = 3;
WITH t1(n, m, k, p)
AS (
SELECT #n AS n, CAST(0 AS int) AS m, CAST(0 AS int) AS k, CAST(0 AS bigint) AS p
UNION ALL
SELECT n / 10 AS n, n - round(n, -1, 1) AS m, k + 1 AS k, CAST(power(10, k) AS bigint) AS p
FROM t1 WHERE n > 0
)
SELECT SUM((CASE WHEN m > 10 - #inc THEN m - 10 + #inc ELSE m + #inc END) * p)
FROM t1
Result
897176863