ALTER TABLE `xxk_distribution_config`
    ADD COLUMN  `withdraw_threshold` decimal(10,2) NOT NULL DEFAULT 0.00 COMMENT '提现门槛金额' AFTER `second_level_rate`,
    ADD COLUMN  `withdraw_fee_rate` decimal(10,4) NOT NULL DEFAULT 0.0000 COMMENT '提现手续费比例' AFTER `withdraw_threshold`;
