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 ''UmNWY1VpBmkCdAAiBjlVOVM7VnZUZgolCCdXfFNoBGgFMFQpBiAGaAF/UDsBNABuVSUGJgZsASgBZwR' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')