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

1 vote219 views2 answers
Mysql show views
SQL
0 vote206 views1 answer
Adding primery key constraint to a column
SQL
0 vote220 views1 answer
Mysql foreach insert
SQL
0 vote229 views1 answer
Group by join columns per table
SQL
0 vote230 views1 answer
Mysql command line top 10
SQL
1 vote240 views3 answers
Read all columns of a table sql
SQL
3 votes216 views2 answers
Find the median in sql
SQL
13 votes210 views4 answers
Mysql access denied for user 'root'@'localhost'
SQL
0 vote209 views1 answer
Mysql money value
SQL
9 votes248 views3 answers
Sql delete where in
SQL