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 ''V2ZSZwQ4B2gNewQmUW4Ha1M7CioAMlp1CyQAK1RvDGAHMlQpVnBUOgd5Bm1TZgRqAXEAIAVvX3YPaQd' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')