Oracle exécuter des citations immédiates

SELECT 'Simple quote''' FROM dual;		-- Simple quote'
SELECT '''Simple quote''' FROM dual;	-- 'Simple quote'

s_date VARCHAR2(10 BYTE) := '12/02/2021';
EXECUTE IMMEDIATE 'SELECT to_date(''' || s_date || ''', ''DD/MM/YYYY'') FROM dual';
VasteMonde