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 ''VmcHMlJuA2wDdVZ0Um1RPVU9BiZXZQolCCdSeQY9DGAANQJ/AiQDbQxyA2hTZlc5A3NRcQBqDicNawJ' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')