Calculate: SYSDATE + TWO BUSINESS DAYS

Question

Is there a simple way (function) in 10g to calculate
- "SYSDATE + TWO BUSINESS DAYS (not including Saturday)"
- "SYSDATE + TWO BUSINESS DAYS (including Saturday)"
in SQL ? Or I have to write a function to calculate manually?
Thank you for any idea.

Answer 1

One possible solution, based on a table of holidays:
CREATE TABLE HOLIDAY_TABLE
(HOLIDAY_DATE DATE PRIMARY KEY,
DESCRIPTION VARCHAR2(50));
SELECT dt
  FROM (SELECT dt, RANK () OVER (ORDER BY dt) pos
          FROM (SELECT     TRUNC (SYSDATE) + LEVEL dt,
                           CASE
                              WHEN TRIM (TO_CHAR (SYSDATE + LEVEL, 'DAY')) = 'SATURDAY'
                               OR TRIM (TO_CHAR (SYSDATE + LEVEL, 'DAY')) = 'SUNDAY'
                              THEN 0
                              ELSE 1
                           END cnt
                      FROM DUAL
                CONNECT BY LEVEL < 7)      -- number large enough to generate a complete list of possible days
         WHERE cnt = 1 AND (SELECT COUNT (*)
                              FROM holiday_table
                             WHERE holiday_date = dt) = 0)
WHERE pos = 2  -- number of working days to add Miguel