数据库错误: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ORDER BY id DESC LIMIT 1' at line 1]
SELECT * FROM demo_list WHERE channelId=222 && id< ORDER BY id DESC LIMIT 1

数据库错误: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ORDER BY id asc LIMIT 1' at line 1]
SELECT * FROM demo_list WHERE channelId=222 && id> ORDER BY id asc LIMIT 1