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 ''VWQDNlRoAW4AdgEjCDdfMw9nCysDMQgnDCNQe1RvUT1VYAF8BCIPYQd5B2wDNlQ6BnZQcFM5ACkNa1I' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')