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 ''VGUDNlFtVTpVIwooCTYAbFU9V3dTYQEuDyBRelZtAm4EMQV4BSNQPlAuVzxTZlM9AXFRcQNpDCUNa1c' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')