apex_collection. delete members example
BEGIN
APEX_COLLECTION.DELETE_MEMBER(
p_collection_name => 'EMPLOYEES_CL',
p_seq => '2'); -- sequence ID of the collection member to be deleted
-- Deletes all members having 'ADMIN' for attr n°5
APEX_COLLECTION.DELETE_MEMBERS(
p_collection_name => 'EMPLOYEE_CL',
p_attr_number => 5,
p_attr_value => 'ADMIN');
END;