text: SET NAMES utf8mb4;
  CREATE TABLE `history` (
    `id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '自增id',
    `filename` varchar(200) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT '文件名',
    `url` varchar(200) COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT 'url',
    `size` int(11) NOT NULL COMMENT '文件大小',
    `mime` datetime NOT NULL COMMENT '文件mime',
    `created_at` datetime NOT NULL COMMENT '创建时间',
    PRIMARY KEY (`id`)
  ) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci COMMENT='PicUploader上传历史记录';