SQL执行错误: Table 'channel_100' already exists<br>SQL: CREATE TABLE `channel_100` (
        `id` int(11) NOT NULL AUTO_INCREMENT,
        `ucid` varchar(50) NOT NULL COMMENT '内容ID',
        `uid` varchar(50) DEFAULT NULL COMMENT '用户ID',
        `title` varchar(255) NOT NULL COMMENT '标题',
        `time` int(11) NOT NULL COMMENT '发布时间戳(秒)',
        `source` varchar(50) NOT NULL COMMENT '来源',
        `summary` text COMMENT '摘要',
        `img_url` varchar(255) DEFAULT NULL COMMENT '图片URL',
        `tags` text COMMENT '标签，JSON格式',
        PRIMARY KEY (`id`),
        UNIQUE KEY `ucid` (`ucid`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='频道数据表'