Oracle: select missing dates

Question

I have a table with (among other things) dates in a field.

I need to get a list of all dates that are more recent than the oldest date, older than the most recent

Answer 1

You need a Calendar table (either permanent or created on the fly). Then you could do a simple:

SELECT c.my_date
FROM 
        calendar c
    JOIN
        ( SELECT MIN(date_column) AS min_date 
               , MAX(date_column) AS max_date 
          FROM tableX
        ) mm
      ON c.mydate BETWEEN min_date AND max_date
WHERE
    c.my_date NOT IN
    ( SELECT date_column
      FROM tableX
    )