|Oracle® Application Express Application Builder User's Guide
|PDF · Mobi · ePub|
You can use a select list to determine the range of values of another select list on the same page. You can achieve this functionality by having a driving select list submit values to a subsequent select list. You incorporate these values in the subsequent select list as a bind variable in the WHERE clause of its query.
To have one LOV drive another LOV:
Create a basic form.
Define two lists of values. Note that the driving LOV must submit the page after a value is chosen.
Define a branch that branches back to the current page.
Consider the following example. The first LOV enables the user to pick a state:
SELECT state_name d, state_id v FROM states
The second LOV selects the county name and county ID based on the state selected in the first LOV:
SELECT county_name d, county_id v FROM counties WHERE state_id = :P1_STATE_ID