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

0 vote309 views1 answer
Dapper run sql script with parameters
SQL
2 votes345 views1 answer
Postgresql create table as select
SQL
5 votes304 views1 answer
Oracle get nls settings
SQL
25 votes314 views5 answers
Uninstall mysql ubuntu
SQL
0 vote326 views1 answer
Apache Derby: Create SQL Dump with data
SQL
0 vote313 views1 answer
Sql describe
SQL
25 votes322 views6 answers
Modify column name in mysql
SQL
0 vote367 views3 answers
Constraint sql
SQL
2 votes323 views1 answer
Oracle run_duration average
SQL
9 votes310 views3 answers
Oracle undo usage by session
SQL