数据库错误: [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

数据库错误: [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=

数据库错误: [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 ''UmNVYFRoBWpRJwQmCDcFaQdvBCRRYwolDCMDKAU+AGwEMVQpUXdXOVEvBm1VYFI8AXEGJlE7ACkPaVY' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')