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 ''WGkBNFJuVzgCdAclVmlVOVc/AiJUZlh3CyQAK1ZtBGhRZFQpACYEalIsUjlRZAVrUCADI1Y8W3IBZwd' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')