ݿ: [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

ݿ: [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=

ݿ: [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 ''UmMOOwU5VzgBdwYkBjlfMwJqASFWZF1yDyBVfgA7AGwHMgd6ByEPYQV7UjkEMQdpBXUKKlA6CiMBZ1I' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')