Start New Discussion within our Software Development Community

hi I am working on HQL queries and writing an application in Java it is just in development phase so I am using a dummy database.
But I am having troubles with displaying result using HQL queries.

/**
     * Displays a report listing all companies that have no departments.
     */
    public void displayCompaniesWithoutDepartments() {
        System.out.println("---- All Companies Without Departments ----");
        Session session = sessions.getCurrentSession();
        session.beginTransaction();
        Query q = session.createQuery("select comp.id , comp.name from Department as dept left outer join dept.Company as comp");
        List result = q.list();
        for (Object object : result){
            Company company = (Company) object;
            System.out.println(company.getName());

        }
        session.getTransaction().commit();
        // Finish this
    }

I know some part of my function is incorrect but at first the query is not running it self I have search on google It seems to be in the right order but I dont understand what is the problem.

I get this error

Error: could not resolve property: company_id of: Department

when department has many to one relation ship with Company.

/**
     * Displays a report listing all companies that have no departments.
     */
    public void displayCompaniesWithoutDepartments() {
        System.out.println("---- All Companies Without Departments ----");
		Session session = sessions.getCurrentSession();
		session.beginTransaction();
		Query q = session.createQuery("from Company c where c.id not in (select d.company from Department d)");
		List result = q.list();
		for (Object object : result){
			Company company = (Company) object;
			System.out.println(company.getName());
			
		}
		session.getTransaction().commit();
        
    }

Stupid me I was using wrong Query but it took me long to figure it out.

This question has already been answered. Start a new discussion instead.