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 ''U2JTZgc7D2BVIwclBzgFaQJqBycHNVp1WnUAKwU+VjpXYlUoBiAOYFcpAmkBNARqAHAKKgZsCSBdO1U' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')