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

6 votes103 views1 answer
Oracle trigger after logon on schema
SQL
0 vote104 views1 answer
1 column values in to 1 single row in sql
SQL
1 vote124 views1 answer
Sql order by timestamp
SQL
0 vote103 views1 answer
Sql select column names starting with
SQL
0 vote116 views1 answer
DELETE DUPLICATE VALUES FROM A TABLE IN SQL SERVER
SQL
0 vote109 views1 answer
Sql select min row
SQL
0 vote101 views1 answer
18446744073709551615 mariadb left join order by
SQL
0 vote104 views1 answer
Product of a column in mysql
SQL
0 vote101 views1 answer
How to get n result in sql
SQL
1 vote103 views2 answers
Mysql switch case
SQL