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 ''UmMDNg4yUzwFcwMhVGtUOAdvUHABMwgnWnUELwoxAW0EMVQpUXcFa1YoVzwGMwBuA3MFJVA6DyYBZ1Q' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')