oracle set date format
ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MM-YYYY HH24:MI:SS';
SELECT sysdate FROM dual;
SELECT to_char(sysdate,'HH24:MI:SS') FROM dual;oracle set date format
ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MM-YYYY HH24:MI:SS';
SELECT sysdate FROM dual;
SELECT to_char(sysdate,'HH24:MI:SS') FROM dual;oracle sysdate
SELECT sysdate - 1 FROM dual; -- Yesterday 12/01/2021 14:27:27
SELECT trunc(sysdate) - 1 FROM dual; -- Yesterday 12/01/2021 00:00:00
SELECT sysdate + INTERVAL '20' DAY FROM DUAL; -- 20 days ahead (other way)
SELECT sysdate - 1 / 24 FROM dual; -- 1 hour ago
SELECT sysdate - 1 / 24 / 60 FROM dual; -- 1 minute ago
SELECT add_months(trunc(sysdate), -1) FROM dual; -- 1 month ago (no time)
SELECT trunc(sysdate) - 30 FROM dual; -- 30 days ago (no time)
SELECT add_months(trunc(sysdate), -12*2) FROM dual; -- 2 years ago (no time)
-- ⇓ Test it ⇓ (Fiddle source link)Copyright © 2021 Codeinu
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