Oracle sql winter time change

ALTER SESSION SET NLS_LANGUAGE=english; -- First day of week
SELECT 
	NEXT_DAY(LAST_DAY(TO_DATE(TO_CHAR('01/10/' -- Last Sunday of October 02:00
        || (EXTRACT(YEAR FROM SYSDATE)-5 + level) || '02:00:00'), 
           'DD/MM/YYYY HH24:MI:SS')) - INTERVAL '7' DAY, 'SUNDAY') AS H_WINTER,
	NEXT_DAY(LAST_DAY(TO_DATE(TO_CHAR('01/03/' -- Last Sunday of March 02:00 
		|| (EXTRACT(YEAR FROM SYSDATE)-5 + level) || '02:00:00'),
		'DD/MM/YYYY HH24:MI:SS')) - INTERVAL '7' DAY, 'SUNDAY') AS H_SUMMER
FROM DUAL CONNECT BY level <=10;
-- ⇓ Test it ⇓ (Fiddle source link)

Similar codes

0 vote101 views3 answers
Above average salary in sql
SQL
0 vote115 views1 answer
Mysql insert multiple rows based on select
SQL
104 votes271 views2 answers
Like in mysql
SQL
0 vote101 views1 answer
Mysql range of dates overlap
SQL
0 vote249 views2 answers
Https://cloud.google.com/shell/docs/using-web-preview#previewing_the_application
SQL
3 votes98 views1 answer
Oracle get trigger ddl
SQL
2 votes143 views1 answer
Creating a view SQL
SQL
0 vote140 views1 answer
Mysql grant access to one database
SQL
0 vote111 views1 answer
Get schema of table sql
SQL
0 vote135 views1 answer
Database disk image is malformed sqlite fix ubuntu
SQL