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 ''VmcEMQE9BmkFc1FzU2xVOVQ8V3cAMlh3AC9QewM4VTlXYgZ7VnAPYQN9AGtVYF8xBHRWdgdtAClfOVc' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')