Question

I have an Oracle 10g table containing 2 date columns, DATE_VALID_FROM from and DATE_VALID_TO.

MY_TABLE:

DATE_VALID_FROM |   DATE_VALID_TO   |   VALUE

15-FEB-13       |   17-FEB-13       |   1.833
14-FEB-13       |   14-FEB-13       |   1.836
13-FEB-13       |   13-FEB-13       |   1.824
12-FEB-13       |   12-FEB-13       |   1.82
11-FEB-13       |   11-FEB-13       |   1.822
08-FEB-13       |   10-FEB-13       |   1.826
07-FEB-13       |   07-FEB-13       |   1.814
06-FEB-13       |   06-FEB-13       |   1.806
05-FEB-13       |   05-FEB-13       |   1.804
04-FEB-13       |   04-FEB-13       |   1.796
01-FEB-13       |   03-FEB-13       |   1.801

The range on the date columns isn’t always one day (weekends).

I can retrieve the value for a single date like this,

select DATE_VALID_FROM, DATE_VALID_TO, VALUE 
from MY_TABLE
where DATE_VALID_FROM <= TO_DATE('16-FEB-13', 'dd-MON-yy')
and DATE_VALID_TO >= TO_DATE('16-FEB-13', 'dd-MON-yy')

Is it possible to retrieve the values for multiple random dates in a single query?

e.g. Values for the 1st, 5th, 6th, 11th and 16th Feb.

Producing this result set:

DATE_VALID_FROM |   DATE_VALID_TO   |   VALUE

15-FEB-13       |   17-FEB-13       |   1.833
11-FEB-13       |   11-FEB-13       |   1.822
06-FEB-13       |   06-FEB-13       |   1.806
05-FEB-13       |   05-FEB-13       |   1.804
01-FEB-13       |   03-FEB-13       |   1.801

Answer 1

Try:

select DATE_VALID_FROM, DATE_VALID_TO, VALUE 
from MY_TABLE M
JOIN (SELECT TO_DATE('01-FEB-2013') DATE_PARAM FROM DUAL UNION ALL
      SELECT TO_DATE('05-FEB-2013') DATE_PARAM FROM DUAL UNION ALL
      SELECT TO_DATE('06-FEB-2013') DATE_PARAM FROM DUAL UNION ALL
      SELECT TO_DATE('11-FEB-2013') DATE_PARAM FROM DUAL UNION ALL
      SELECT TO_DATE('16-FEB-2013') DATE_PARAM FROM DUAL) D
  ON M.DATE_VALID_FROM <= D.DATE_PARAM and M.DATE_VALID_TO >= D.DATE_PARAM

SQLFiddle here