First Day and Last Day, First Date and Last Date


SELECT TO_NUMBER (TO_CHAR (TRUNC (LAST_DAY (ADD_MONTHS (SYSDATE, -1)) + 1), ‘DD’)) FIRST,
TO_NUMBER (TO_CHAR (LAST_DAY (SYSDATE), ‘DD’)) LAST
FROM DUAL

SELECT LAST_DAY (ADD_MONTHS (SYSDATE, -1)) + 1 FIRST, LAST_DAY (SYSDATE) LAST
FROM DUAL

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