I have a requirement to display dates every week starting from current date for 48 months.
I was wondering if it is possible through SQL or i will have to write a function to achieve it.
Below is my SQL so far :-
SELECT CALENDAR_DATE FROM CALENDAR --My Table Name WHERE ( CALENDAR_DATE >= trunc(sysdate) AND CALENDAR_DATE <= ADD_MONTHS(TRUNC(SYSDATE, 'MONTH'), 48)-1 )
This would give me output as
9/10/2020 9/11/2020 9/12/2020 9/13/2020
Expected Output :-
9/10/2020 9/17/2020 9/24/2020 10/01/2020
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Answer
If I understand correctly:
WHERE CALENDAR_DATE >= trunc(sysdate) AND CALENDAR_DATE <= ADD_MONTHS(TRUNC(SYSDATE, 'MONTH'), 48) - 1 AND MOD(CALENDAR_DATE - TRUNC(sysdate), 7) = 0
This uses the mod()
operation on the date difference. You can also check the day of the week:
WHERE CALENDAR_DATE >= trunc(sysdate) AND CALENDAR_DATE <= ADD_MONTHS(TRUNC(SYSDATE, 'MONTH'), 48) - 1 AND TO_CHAR(CALENDAR_DATE, 'DY') = TO_CHAR(sysdate, 'DY')