Question

The query below does not work

missing right parenthesis

but you know what I need to get, so how I can get it to work?
how should I write it!

SELECT sysdate,
       (sysdate + interval (to_char(sysdate, 'YYYY') - 2011) YEAR) as tt
FROM dual;

I was thinking of this solution

SELECT sysdate,
       add_months(sysdate,12*(to_char(sysdate, 'YYYY') - 2011))
FROM dual;

is it a correct approach?

Thanks

Answer 1

This should get you to what you are looking for:

SELECT
    sysdate,
    (sysdate + TO_YMINTERVAL((to_char(sysdate, 'YYYY') - 2011)||'-0')) as tt
FROM dual; 

Note the appending of the “-0” is necessary, since there is no Year interval, it has years and months (the “-0” indicates 0 months).

It should also be noted that this will cause problems on leap day, since Feb 29 doesn’t exist next year.

I would solve this problem by converting your years to months (multiply by 12) and using add_months:

SELECT
    sysdate,
    add_months(sysdate, (to_char(sysdate, 'YYYY') - 2011)*12) as tt
FROM dual;

Which on leap day will return 2/28/2013 for tt.