exec('ALTER TABLE user DROP COLUMN IF EXISTS `last_day_t`;'); DB::getPdo()->exec("ALTER TABLE user ADD COLUMN IF NOT EXISTS `transfer_today` bigint(20) unsigned DEFAULT 0 COMMENT '账户今日所用流量';"); return 2023050800; } public function down(): int { DB::getPdo()->exec("ALTER TABLE user ADD COLUMN IF NOT EXISTS `last_day_t` bigint(20) DEFAULT 0 COMMENT '今天之前已使用的流量';"); DB::getPdo()->exec('ALTER TABLE user DROP COLUMN IF EXISTS `transfer_today`;'); return 2023032600; } };