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 vote235 views1 answer
Concat column value of same user in mysql
SQL
0 vote193 views3 answers
Postgres trim string
SQL
1 vote217 views1 answer
Sql first
SQL
4 votes206 views2 answers
REST API
SQL
0 vote159 views1 answer
Best way to create a temp table with same columns and type as a permanent table
SQL
0 vote188 views1 answer
Postgres jsonb array push new element
SQL
0 vote186 views1 answer
Date datatype in livesql
SQL
0 vote154 views1 answer
Copy table dbeaver
SQL
0 vote194 views1 answer
Vbscript connect mssql
SQL
2 votes201 views1 answer
Oracle convert run_duration to number
SQL