Query for related dropdowns

Question

Query 1:
select ' ' as APPLICATION_NAME from DUAL
UNION
SELECT NVL(APPLICATION_NAME, ' ') as APPLICATION_NAME
from(
select     ENTITLEMENT.APPLICATION_NAME as APPLICATION_NAME
from     EC_ADMIN.ENTITLEMENT ENTITLEMENT
Query 2:
select ' ' as MODULE_NAME from DUAL
UNION
SELECT NVL(MODULE_NAME, ' ') as MODULE_NAME
from(
select     ENTITLEMENT.MODULE_NAME as MODULE_NAME
from EC_ADMIN.ENTITLEMENT ENTITLEMENT
iam having two dropdowns Application_name and Module_name. If i select Application_name the related fields should be displayed in Module_name can any one help me to change the Query2 accordingly ...

Answer 1

SELECT ' ' AS MODULE_NAME FROM DUAL
UNION
SELECT NVL(MODULE_NAME, ' ') AS MODULE_NAME
FROM
  (SELECT ENTITLEMENT.MODULE_NAME AS MODULE_NAME
  FROM EC_ADMIN.ENTITLEMENT ENTITLEMENT
  WHERE entitlement.application_name = :application_name
  )You will have to pass the application name to the stored procedure, if you are using any, else Bind it.
Regards,
P.