【错误笔记】记录一个蛋疼的mysql建表错误 - 1064

-- 应用信息表
DROP TABLE IF EXISTS `ks_apps_info`;
CREATE TABLE `ks_apps_info` (
  `appid` int(11) NOT NULL COMMENT ‘应用id, 由业务网关产生‘,
  `appname` varchar(255) NOT NULL DEFAULT ‘默认应用‘ COMMENT ‘应用名称‘,
  `access_token` varchar(255) NOT NULL DEFAULT ‘‘ COMMENT ‘访问授权码‘,
  `instance_count` int(11) NOT NULL DEFAULT 0 COMMENT ‘实例个数‘,
  `create_time` datetime NOT NULL DEFAULT ‘0000-00-00 00:00:00‘ COMMENT ‘创建记录时间‘,
  `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT ‘更新时间戳‘,
  PRIMARY KEY (`appid`),
  UNIQUE KEY `idx_accesstoken` (`access_token`) USING HASH,
)ENGINE=InnoDB DEFAULT CHARSET=utf8;