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 ''VWQGMwE9DmEMegAiVmlWOlI6CysDMQ4hCCdXfAE6Am5XYlIvBiAOYFYoAmkANQVrUiIDIwNpACkJbwB' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')