ALTER TABLE `cai_account_cash`
    ADD COLUMN `coin_callback_coin` int(11) NOT NULL DEFAULT 0 COMMENT '提现紫贝返还值' AFTER `withdraw_coin`,
    ADD COLUMN `coin_fees` int(11) NOT NULL DEFAULT 0 COMMENT '提现紫贝手续费' AFTER `coin_callback_coin`;
update cai_account_cash
set coin_callback_coin = withdraw_coin;
