-- 浙江省油价历史表
--   - date: 调价日次日 (即数据实际抓取日, 便于按时间排序)
--   - province + fuel: 浙江 / 92/95/0
--   - unique (date, province, fuel): 防 cron 重复入库
--   - DOUBLE 容纳 999.999 元/升
CREATE TABLE OilPriceHistory (
    id INT NOT NULL AUTO_INCREMENT,
    date DATETIME(3) NOT NULL,
    province VARCHAR(191) NOT NULL,
    fuel VARCHAR(8) NOT NULL,
    price DOUBLE NOT NULL,
    source VARCHAR(191) NOT NULL DEFAULT 'apizero',
    createdAt DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    PRIMARY KEY (id),
    UNIQUE INDEX OilPriceHistory_date_province_fuel_key(date, province, fuel),
    INDEX OilPriceHistory_province_fuel_date_idx(province, fuel, date)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;