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 ''BDUPOlRoVToCdFd1BzhXOwBoBSUNP1h3CiVVfgQ/VjpQZVEsVnBTPQ1zBW4ANVA+AHAAIAdtCiNYPlA' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')