public static void DeleteTransaction(int transaction_id)
        {
            var attrValue = DB_IO.AttrValue();

            attrValue[DB_API.TransactionEnt.transaction_id] = transaction_id;
            DB_IO.Delete(DB_IO.DB_Interface.pr_delete_transaction, attrValue);
        }
        public static void DeleteMoneyAccount(int account_id)
        {
            var attrValue = DB_IO.AttrValue();

            attrValue[MoneyAccountEnt.account_id] = account_id;
            DB_IO.Delete(DB_IO.DB_Interface.pr_delete_money_account, attrValue);
        }
        public static void DeleteUser(string email)
        {
            var attrValue = DB_IO.AttrValue();

            attrValue[UserEnt.email] = email;
            DB_IO.Delete(DB_IO.DB_Interface.pr_delete_user, attrValue);
        }
        public static void MoneyAccountRemoveUser(int account_id, string user_email)
        {
            var attrValue = DB_IO.AttrValue();

            attrValue[MoneyAccountEnt.account_id] = account_id;
            attrValue[MoneyAccountEnt.user_email] = user_email;
            DB_IO.Delete(DB_IO.DB_Interface.pr_money_account_remove_user, attrValue);
        }
        public static void DeleteStocksByCompany(int accountID, string company, double purchasePrice, double askPrice)
        {
            var attrValue = DB_IO.AttrValue();

            attrValue[DB_API.StockEnt.account_id]     = accountID;
            attrValue[DB_API.StockEnt.company]        = company;
            attrValue[DB_API.StockEnt.purchase_price] = purchasePrice;
            attrValue[DB_API.StockEnt.ask_price]      = askPrice;
            DB_IO.Delete(DB_IO.DB_Interface.pr_delete_purchased_stocks, attrValue);
        }
        public static void DeleteStockByTicker(int accountID, int ticker, double purchasePrice, double askPrice)
        {
            var attrValue = DB_IO.AttrValue();

            attrValue[DB_API.StockEnt.account_id]     = accountID;
            attrValue[DB_API.StockEnt.ticker]         = ticker;
            attrValue[DB_API.StockEnt.purchase_price] = purchasePrice;
            attrValue[DB_API.StockEnt.ask_price]      = askPrice;
            DB_IO.Delete(DB_IO.DB_Interface.pr_delete_purchased_stocks, attrValue);
        }