Sql: Inserting Row For Missing Month(s)

I have a table as follow: |----------|----------| | DT | FLAG | |----------|----------| | 2015-MAY | E | | 2015-JUN | H | | 2015-OCT | E | | 2016-FEB

Solution 1:

Thanks jspcal for the link that inspired this answer.

Got it work with

CREATEOR REPLACE PROCEDURE FILL_DATE_GAP ASBEGININSERTINTO DUMMY_DATES 
    SELECT to_date(add_months(date'2015-01-01', level -1), 'yyyy-mm-dd') mth, 
           'V'FROM   DUAL 
    connectby level <=14
    MINUS
    SELECT DT, 
           FLAG
    FROM   DUMMY_DATES;
END FILL_DATE_GAP;

Demo