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 ''U2JSZwc7BGtXIQIgCTZWOlU9AiIENgwjAS4CKQc8DGACNwZ7DihUOlUrBW5UYQVrUyNRcQVvCyJYPlM' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')