Ifv the parent child relationship is set, you can add Get Fields to your Policies Entity and then lookup to the parent Table in this way:

public string ClientName
>{
>    get
>    {
>        string clientName = ""
>        PolicyObj polObj = this.GetBusinessObject() as PolicyObj;
>        if (polObj != null)
>        {
>            if (polObj.ParentBizObj != null)
>            {
>                ClientObj cliObj = polObj.ParentBizObj as ClientObj;
>                if (cliObj != null && cliObj.Entity != null) clientName = cliObj.Entity.ClientName;
>            }
>        }
>        return clientName;
>    }
>}

You also can get data from a view.