Oracle sql date summer 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

1 vote338 views1 answer
Difference between where and having clause
SQL
0 vote288 views1 answer
Postgresql like
SQL
17 votes258 views5 answers
Order by sql
SQL
8 votes303 views6 answers
Insert command in sql
SQL
0 vote269 views1 answer
Sql server set complex constraints
SQL
0 vote260 views2 answers
Sql if empty then
SQL
3 votes303 views6 answers
DB::table('users')->get();
SQL
0 vote262 views1 answer
Create mysql pool connection python flask
SQL
2 votes262 views1 answer
Apex execute batch job
SQL
1 vote278 views1 answer
Random name function in mysql for nvarchar
SQL