How to get the month previous year?

Hello

I have to get the previous year three-months of the effective date, but I have a problem since the beginning of the year and it's because I set the incorrect query.

I mean:

I wrote this query

SELECT TO_CHAR(SYSDATE,'YYYYMM')-1, 2-TO_CHAR(SYSDATE,'YYYYMM'), TO_CHAR(SYSDATE,'YYYYMM')-3

FROM DUAL;

in order to get (on mars):

201502, 201501, 201412

but unfortunately, I get:

201502, 201501, 201500

Can you help me?

Thanks in advance!

Hello

Here's one way:

SELECT TO_CHAR (ADD_MONTHS (SYSDATE-1), "YYYYMM") AS the m1

, TO_CHAR (ADD_MONTHS (SYSDATE-2), "YYYYMM") AS m2

, TO_CHAR (ADD_MONTHS (SYSDATE,-3), "YYYYMM") M3

DOUBLE;

Tags: Database

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