Apex Select List

Question

Hi,
In my application. I have a requirement like the below
one select list is there where iam displaying the country name returning country code.
another select list i have a province name displayed returning the province code.
Now my requirement is when i select country name another province select list should show only the province names belongs to that country dynamically,
created dynamic action and wrote plsql function on change event to set value as follows but no luck please advice.
IF :LANG_PREF_CD = 'E' THEN
RETURN 'SELECT province_name
, province_id
FROM (SELECT E_province_name province_name
, province_id province_id
FROM province_table
where province_table.country_id=:p1_country_name
UNION ALL SELECT 0, '' '', NULL FROM DUAL )
ORDER BY province_id;
ELSE
RETURN 'SELECT province_name
, province_id
FROM (SELECT f_province_name province_name
, province_id province_id
FROM province_table
where province_table.country_id=:p1_country_name
UNION ALL SELECT 0, '' '', NULL FROM DUAL )
ORDER BY province_id;
END IF ;
can any one help where is the mistake please. thanks

Answer 1

Hi,
not sure for older versions but for > Apex 4.0 this is possible "out of the box".
Define 1 list of values called country and set this as the LOV on your country field ( e.g. P11_COUNTRY ).
Define a second field called P11_PROVINCE and set Cascading LOV Parent Item(s) to P11_COUNTRY, also set Page Items to Submit to P11_COUNTRY
now define the list of values for the P11_PROVINCE in the List of values definition on the item page ( so not a named LOV since you shoudlk reference a page item ):
select
     province,ID
from provincelovtable
where
and country_id = :P11_COUNTRY
The field country_id should contain the country id where the province is linked to.
regards
Bas