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 ''UmNVYFRoUj1VIwYkBDsHa1c/ASFUZg4hCiUEL1NoDGBQZQF8BSNQPlAuAWoHMlU7D39XdwBqXHUNawN' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')