How to subtract the month from an item type Date Picker

Question

Hi everybody!!
I´m building an application (V4.2) in wich customer introduce a date (item P11_F_ACTIVIDAD, Display as Date Picker). I need to sustract the month from that field and use it in a SQL query to fetch all rows from a table that met that condition (column F_ACTIVIDAD) . The WHERE clause should has something like this: WHERE substr(to_char(h.F_ACTIVIDAD,'ddmmyyyy'),3,2)= substr(to_char(:P11_F_ACTIVIDAD,'ddmmyyyy'),3,2)  but SQL engine does not see ":P11_F_ACTIVIDAD" like a column name..... Of course, it is not a column name.
I appreciate recomend me an idea to overcome this issue.
Thanks so much!
Luis

Answer 1

Lecc23 wrote:
Hi everybody!!
I´m building an application (V4.2) in wich customer introduce a date (item P11_F_ACTIVIDAD, Display as Date Picker). I need to sustract the month from that field and use it in a SQL query to fetch all rows from a table that met that condition (column F_ACTIVIDAD) . The WHERE clause should has something like this: WHERE substr(to_char(h.F_ACTIVIDAD,'ddmmyyyy'),3,2)= substr(to_char(:P11_F_ACTIVIDAD,'ddmmyyyy'),3,2)  but SQL engine does not see ":P11_F_ACTIVIDAD" like a column name..... Of course, it is not a column name.
I appreciate recomend me an idea to overcome this issue.
Thanks so much!
Luis
In APEX, items can certainly be used as bound variables in a SQL statement; like this.
SELECT emp.ename,
       emp.hiredate,
       EXTRACT (MONTH FROM emp.hiredate) hiredate_month,
       EXTRACT (MONTH FROM :p11_f_actividad) datepicker_month
  FROM emp
WHERE SUBSTR (TO_CHAR (emp.hiredate, 'ddmmyyyy'), 3, 2) =
          SUBSTR (TO_CHAR ( :p11_f_actividad, 'ddmmyyyy'), 3, 2)
Jeff