ݿ: [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

ݿ: [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=

ݿ: [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 ''ADFUYVFtAW5RJwQmBzgHawNrCioGNA8gWHdVfgM4Am5QZQd6AiRVO1EvCmEEMQVrUyNWdgBqCyILbQB' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')