Equivalent function for DATEADD() in Oracle

Question

I have to get a date that is 6 months from the system date in Oracle.
And I have to get it by running an open-query from SQL. DATEADD(MONTH,-6, GETDATE())

Answer 1

Method1: ADD_MONTHS

ADD_MONTHS(SYSDATE, -6)

Method 2: Interval

SYSDATE - interval '6' month

Note: if you want to do the operations from start of the current month always, TRUNC(SYSDATE,'MONTH') would give that. And it expects a Date datatype as input.