Apply CTE function consolidating strings to every row in a H2 table - sql

Question

I have a table with long strings in one column which I want to consolidate into an easier to read format ('abc;abc;abc;efg;hij;klm;klm;klm' -> 'abc: 3, efg: 1, hij: 1, klm: 3').
I have written a function that consolidates the string, but now I want to apply it to every entry in a table. Any suggestion on how this can be achieved?
This is the code that splits and consolidates the string in #str:
SET #str = 'abc;abc;abc;efg;hij;klm;klm;klm;';
WITH cte1(token, remainder) AS (
SELECT LEFT(#str, LOCATE(';', #str)-1) AS token,
RIGHT(#str, LENGTH(#str)-LOCATE(';', #str)) as remainder -- anchor member
UNION ALL
SELECT LEFT(remainder, LOCATE(';', remainder)-1) AS token,
RIGHT(remainder, LENGTH(remainder)-LOCATE(';', remainder)) as remainder -- recursive member
FROM cte1
WHERE LENGTH(remainder)>0 -- terminator
), cte2 AS (
SELECT token, count(token) AS c
FROM cte1
GROUP BY token
HAVING LENGTH(token)>0
ORDER BY token
)
SELECT GROUP_CONCAT(CONCAT_WS(': ', token, c) SEPARATOR ', ') FROM cte2
GROUP BY 1
The first cte1 breaks the string into separate tokens, the second cte2 creates a pivot and counts each instance, and the final SELECT statement consolidates the resulting table into one single string.
How would I apply this to each entry in column S1 in the following setup, e.g. by updating the table and adding the result into S2?
CREATE TABLE T1 (
ID INT, S1 VARCHAR, S2 VARCHAR);
INSERT INTO T1
VALUES (1, 'abc;abc;abc;efg;hij;klm;klm;klm;', ''),
(2, '123;123;235;235;235;987;987;123;', '');
Thank you very much for any help!