How to convert these julian dates to oracle date format?

JohnD picture JohnD · Jul 10, 2014 · Viewed 31.7k times · Source

Below is a sample set of data that is supposed to be dates. I am not sure what kind of format it should be but I was told they are julian dates.

     DATE
    92017
    92320
    99002
    99003
    112010
    112011
    112012
    112013

Can anyone convert them into oracle dates? I tried

select to_date(DATE,'J') from dual

but some results were in the 1950s and 1940s which doesn't seen right for the data we are dealing with. Am i doing it right here?

I also tried this formula from this link: http://www.kirix.com/stratablog/jd-edwards-date-conversions-cyyddd

SELECT 
TO_DATE(1900+(DATE/1000),1,1)+
TO_NUMBER(SUBSTR(TO_CHAR(DATE),4))-1  FROM DUAL;

Thanks

Answer

Bob picture Bob · Jul 10, 2014

-- Using JD Edwards Date Conversions if DATE is a number

select to_date(to_char(1900 + floor(DATE / 1000)),'YYYY') + mod(DATE,1000) - 1 from dual;

-- Using JD Edwards Date Conversions if DATE is a string

select to_date(to_char(1900 + floor(to_number(DATE) / 1000)),'YYYY') + mod(to_number(DATE),1000) - 1 from dual;