Convert number to date sql oracle

问题

I'm trying to convert a number (yyyymmdd) to date (mm/dd/yyyy)

For example

20150302 ====> 03/02/2015

回答1:

You can try this:

select to_date(20150302,'yyyymmdd') from dual;

select to_char(to_date(20150302,'yyyymmdd'),'mm/dd/yyyy') from dual;

回答2:

You can use TO_DATE function to convert NUMBER to DATE. Try in following:

SELECT TO_DATE(20150302, 'YYYYMMDD') FROM DUAL

回答3:

TO_DATE accepts char of CHAR, VARCHAR2, NCHAR, or NVARCHAR2 datatype and converts into a value of DATE datatype.

So, convert the number into string, and apply to_date. You could use single-quotation marks around the number to convert it into string.

SELECT TO_DATE('20150302', 'YYYYMMDD')  FROM dual;

Remember, a DATE has no format, what you see is for display purpose. If you want to display the date in a desired format, then use TO_CHAR along with your desired format model.

SELECT TO_CHAR(TO_DATE('20150302', 'YYYYMMDD'), 'mm/dd/yyyy') FROM dual;