Function to retrieve all days of the previous month.

Question

Hi,
Yes, it's a monthly report i've been given the task to achieve.
So, all I need is all days of previous month (even if there is no data for this day)
I've been instructed to use the following code, but it does not return any value:
DECLARE
   CURSOR CUR_LAST_DAY IS
      SELECT TO_CHAR (LAST_DAY (ADD_MONTHS (SYSDATE, -1) ), 'DD')
        FROM DUAL;
   VVA_LAST_DAY   VARCHAR2 (2);
   VNU_JOUR       NUMBER       := 0;
BEGIN
   OPEN CUR_LAST_DAY;
   FETCH CUR_LAST_DAY
    INTO VVA_LAST_DAY;
   CLOSE CUR_LAST_DAY;
   WHILE VNU_JOUR <= TO_NUMBER (VVA_LAST_DAY) - 1
   LOOP
      VNU_JOUR := VNU_JOUR + 1;
   END LOOP;
END;
--CLOSE CUR_LAST_DAY
--DEALLOCATE CUR_LAST_DAY-----
On the other end, i've developped this code:
SELECT TO_CHAR(SYSDATE,'dd')
FROM DUAL
WHERE TO_CHAR(SYSDATE,'dd') >= to_char(to_date(to_char(ADD_MONTHS(SYSDATE, -1),'yyyy-mm')||'-01'),'yyyy-mm-dd')
AND TO_CHAR(SYSDATE,'dd') < to_char(LAST_DAY(to_date(to_date(to_char(ADD_MONTHS(SYSDATE, -1),'yyyy-mm')||'-01'),'yyyy-mm-dd')));Which is returning a null value. :(
Regards

Answer 1

Hello,
You want to retrieve complete days of last month from one query...so here it is..
SELECT
TO_DATE(LEVEL||'-'||TO_CHAR(ADD_MONTHS(SYSDATE,-1),'MON-YY'),'DD-MON-YY') COMP_DATE,
TO_CHAR(TO_DATE(LEVEL||'-'||TO_CHAR(ADD_MONTHS(SYSDATE,-1),'MON-YY'),'DD-MON-YY'),'DD') ONLY_DD,
TO_CHAR(TO_DATE(LEVEL||'-'||TO_CHAR(ADD_MONTHS(SYSDATE,-1),'MON-YY'),'DD-MON-YY'),'MM') ONLY_MM,
TO_CHAR(TO_DATE(LEVEL||'-'||TO_CHAR(ADD_MONTHS(SYSDATE,-1),'MON-YY'),'DD-MON-YY'),'YY') ONLY_YY
FROM DUAL
CONNECT BY LEVEL <= TO_NUMBER(TO_CHAR(LAST_DAY(ADD_MONTHS(SYSDATE,-1)),'DD'))I am not at database machine so therefore not tested.
But one thing keep in mind that this forum only for reports there is separate forum for sql and pl/sql.
Function to retrieve all days of the previous month.
-Ammad
Edited by: Ammad Ahmed on Apr 22, 2010 10:53 PM
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