Oracle 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 vote349 views2 answers
Plsql regex match whole word
SQL
0 vote364 views1 answer
Alter boolean column postgresql
SQL
11 votes339 views2 answers
Set default column value sql
SQL
0 vote339 views1 answer
PG::ForeignKeyViolation: ERROR: update or delete on table violates foreign key constraint
SQL
0 vote352 views1 answer
Sql get number of days between two dates
SQL
2 votes374 views1 answer
Java.lang.arrayindexoutofboundsexception: index 0 out of bounds for length 0
SQL
0 vote299 views1 answer
Flask_sqlalchemy install
SQL
0 vote358 views1 answer
How to to get time in sql
SQL
4 votes331 views1 answer
Postgresql show current database
SQL
1 vote355 views1 answer
Psql search table
SQL