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 ''WWhWYwA8BGtVI1Z0Aj1QPAZuUXFUZlxzWnUAKwY9AW0FMAZ7ACYCbAd5CmFRZFM9VCQLK1E7DCUIbgd' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')