public class BrokerageAccount {
  String accountNumber;
  String customerSocialSecurityNumber;
  
  // pominęliśmy konstruktory itp.

  public Customer getCustomer() {
    String sqlQuery =
      "SELECT * FROM CUSTOMER WHERE" +
      "SS_NUMBER='"+customerSocialSecurityNumber+"'";
    return QueryService.findSingleCustomerFor(sqlQuery);
  }
  public Set getInvestments() {
    String sqlQuery =
      "SELECT * FROM INVESTMENT WHERE" +
      "BROKERAGE_ACCOUNT='"+accountNumber+"'";
    return QueryService.findInvestmentsFor(sqlQuery);
  }
}
