Oracle 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

8 votes219 views4 answers
Convert date to dd/mm/yyyy sql
SQL
1 vote194 views2 answers
Mysql insert generate serie
SQL
0 vote182 views1 answer
Sql where part of string match
SQL
2 votes193 views1 answer
Mysql create user with mysql_native_password
SQL
2 votes164 views1 answer
Codeigniter print last sql query
SQL
0 vote198 views1 answer
Minus equivalent in my sql
SQL
1 vote186 views1 answer
SQL: merging multiple row data in string
SQL
13 votes191 views5 answers
Sql default
SQL
16 votes183 views6 answers
Install sqlite3 python
SQL
1 vote169 views1 answer
Mysql select month and year
SQL