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 cookies from demo_cookie where userid= 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 '' at line 1]
delete from demo_cookie where userid=

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 ''V2ZWY1JuUj0MegIgU2wAbA5mCysFN19wDSIAKwswBGhYbQd6UXcGaFIsUjkIPQBuVSUGJlY8CyIMagJ' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')