Oracle date winter time

ALTER SESSION SET NLS_LANGUAGE=english; -- First day of week
SELECT
	-- Last Sunday of October at 02:00
	NEXT_DAY(LAST_DAY(TO_DATE(TO_CHAR('01/10/' 
        || (EXTRACT(YEAR FROM SYSDATE)-5 + level) || '02:00:00'), 
           'DD/MM/YYYY HH24:MI:SS')) - INTERVAL '7' DAY, 'SUNDAY') AS H_WINTER,
	-- Last Sunday of March at 02:00 (missing hour)
	NEXT_DAY(LAST_DAY(TO_DATE(TO_CHAR('01/03/' 
		|| (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;

Similar codes

0 vote230 views2 answers
Clear window pl sql
SQL
0 vote236 views1 answer
Sql character index
SQL
2 votes251 views1 answer
Mysql select default if null
SQL
5 votes226 views1 answer
Oracle ora-00054 causes
SQL
4 votes216 views2 answers
What is table in sql
SQL
8 votes249 views1 answer
Oracle add datafile to tablespace
SQL
2 votes237 views2 answers
Oracle no data found error code
SQL
0 vote239 views1 answer
How to import pymysql through jupyter notebook for windows
SQL
0 vote247 views1 answer
Postgresql on conflict pair
SQL
1 vote233 views2 answers
Update with inner join sql server
SQL