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 ''AjNUYQI+VzgMelZ0AzwEaAJqV3dXZV9wDyBVflRvAW0DNlYrVHJTPQR6AGsEMVE/A3MHJwVvX3ZcOgJ' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')