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